How do I get the population by country when using the Esri Demographics Geoprocessing Service?How to navigate...
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How do I get the population by country when using the Esri Demographics Geoprocessing Service?
How to navigate the REST endpoints and retrieve Field information programaticallyAbout proxy in javascript apiESRI geoprocessing service with Javascript API 3.5What is correct entry to Input Location (GPFeatureRecordSetLayer)*?How to get/pass token with ajax call to secured ArcGIS REST ServiceHow to avoid Cross Origin problem when trying to use ArcGIS Online Geocode server?ArcGIS API for JavaScript QueryTask for user's own mapArcGIS Javascript Legend widget does not show full color rampArcGIS JavaScript API: SEC7127: Redirect was blocked for CORS request after submitting geoprocessing jobStuck on getting proxy to work
I am using the ArcGIS JavaScript API and Geoprocessing Services to get population. The service takes an input circle and returns the population inside.
Some times, a circle can cover cover more than one country (for example Spain and Portugal) but I need to get the population of a single country using a filter.
I am using this function to get the area using Google Maps:
function getPop()
myFunctions.ftn_findpop1(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius());
}
Then...
function findPop(ring) {
var gp = new esri.tasks.Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
...
arcgis-10.2 arcgis-javascript-api geoprocessing
edited Jan 22 at 13:43
KHibma
10.2k11839
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
bumped to the homepage by Community♦ 30 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
|
show 1 more comment
I am using the ArcGIS JavaScript API and Geoprocessing Services to get population. The service takes an input circle and returns the population inside.
Some times, a circle can cover cover more than one country (for example Spain and Portugal) but I need to get the population of a single country using a filter.
I am using this function to get the area using Google Maps:
function getPop()
myFunctions.ftn_findpop1(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius());
}
Then...
function findPop(ring) {
var gp = new esri.tasks.Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
...
arcgis-10.2 arcgis-javascript-api geoprocessing
edited Jan 22 at 13:43
KHibma
10.2k11839
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
bumped to the homepage by Community♦ 30 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
What precisely have you tried so far? Are you doing this using ArcObjects, ArcPy or another part of the Geoprocessing Framework?
– PolyGeo♦
Jan 18 at 21:25
Cross-posted as stackoverflow.com/q/54238580/820534
– PolyGeo♦
Jan 19 at 12:18
Thank you very much for your answers. Let me be more clear: I am getting an area with this : function ... () { ....(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius()} And then... { var gp = new esri.tasks.Geoprocessor("sampleserver1.arcgisonline.com/ArcGIS/rest/services/…); ... to get the total population. The problem is that some times, the circle can cover more than one country and I need to get the results by country. Does it make sense? Thank you very much!
– Roger Peñarroya i Zaldívar
Jan 22 at 12:21
I can't add an answer as the question is currently locked, but I'll caution a couple things. 1) This is a sample service, I wouldn't take it as being authoritative. 2) The data in this service is probably 5+ years old 3) Population counts have been interpolated to a raster dataset. I think that raster had a cell size of 250, perhaps even 1000km. It's very, very coarse. Clipping population size to actual country boundaries isn't going to be very accurate. If you're "ok" with what I'd call rough population estimates, this service would be ok to use.
– KHibma
Jan 22 at 13:46
Actually you can see the source data in a map service here:https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/MapServer-- the cell size looks to be about 4km x 4km. So it might not be as bad as I thought
– KHibma
Jan 22 at 13:50
|
show 1 more comment
I am using the ArcGIS JavaScript API and Geoprocessing Services to get population. The service takes an input circle and returns the population inside.
Some times, a circle can cover cover more than one country (for example Spain and Portugal) but I need to get the population of a single country using a filter.
I am using this function to get the area using Google Maps:
function getPop()
myFunctions.ftn_findpop1(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius());
}
Then...
function findPop(ring) {
var gp = new esri.tasks.Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
...
arcgis-10.2 arcgis-javascript-api geoprocessing
edited Jan 22 at 13:43
KHibma
10.2k11839
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
I am using the ArcGIS JavaScript API and Geoprocessing Services to get population. The service takes an input circle and returns the population inside.
Some times, a circle can cover cover more than one country (for example Spain and Portugal) but I need to get the population of a single country using a filter.
I am using this function to get the area using Google Maps:
function getPop()
myFunctions.ftn_findpop1(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius());
}
Then...
function findPop(ring) {
var gp = new esri.tasks.Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
...
arcgis-10.2 arcgis-javascript-api geoprocessing
arcgis-10.2 arcgis-javascript-api geoprocessing
edited Jan 22 at 13:43
KHibma
10.2k11839
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
edited Jan 22 at 13:43
KHibma
10.2k11839
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
edited Jan 22 at 13:43
KHibma
10.2k11839
edited Jan 22 at 13:43
KHibma
10.2k11839
edited Jan 22 at 13:43
KHibma
10.2k11839
10.2k11839
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
asked Jan 18 at 19:26
Roger Peñarroya i ZaldívarRoger Peñarroya i Zaldívar
11
11
bumped to the homepage by Community♦ 30 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 30 mins ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
What precisely have you tried so far? Are you doing this using ArcObjects, ArcPy or another part of the Geoprocessing Framework?
– PolyGeo♦
Jan 18 at 21:25
Cross-posted as stackoverflow.com/q/54238580/820534
– PolyGeo♦
Jan 19 at 12:18
Thank you very much for your answers. Let me be more clear: I am getting an area with this : function ... () { ....(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius()} And then... { var gp = new esri.tasks.Geoprocessor("sampleserver1.arcgisonline.com/ArcGIS/rest/services/…); ... to get the total population. The problem is that some times, the circle can cover more than one country and I need to get the results by country. Does it make sense? Thank you very much!
– Roger Peñarroya i Zaldívar
Jan 22 at 12:21
I can't add an answer as the question is currently locked, but I'll caution a couple things. 1) This is a sample service, I wouldn't take it as being authoritative. 2) The data in this service is probably 5+ years old 3) Population counts have been interpolated to a raster dataset. I think that raster had a cell size of 250, perhaps even 1000km. It's very, very coarse. Clipping population size to actual country boundaries isn't going to be very accurate. If you're "ok" with what I'd call rough population estimates, this service would be ok to use.
– KHibma
Jan 22 at 13:46
Actually you can see the source data in a map service here:https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/MapServer-- the cell size looks to be about 4km x 4km. So it might not be as bad as I thought
– KHibma
Jan 22 at 13:50
|
show 1 more comment
What precisely have you tried so far? Are you doing this using ArcObjects, ArcPy or another part of the Geoprocessing Framework?
– PolyGeo♦
Jan 18 at 21:25
Cross-posted as stackoverflow.com/q/54238580/820534
– PolyGeo♦
Jan 19 at 12:18
Thank you very much for your answers. Let me be more clear: I am getting an area with this : function ... () { ....(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius()} And then... { var gp = new esri.tasks.Geoprocessor("sampleserver1.arcgisonline.com/ArcGIS/rest/services/…); ... to get the total population. The problem is that some times, the circle can cover more than one country and I need to get the results by country. Does it make sense? Thank you very much!
– Roger Peñarroya i Zaldívar
Jan 22 at 12:21
I can't add an answer as the question is currently locked, but I'll caution a couple things. 1) This is a sample service, I wouldn't take it as being authoritative. 2) The data in this service is probably 5+ years old 3) Population counts have been interpolated to a raster dataset. I think that raster had a cell size of 250, perhaps even 1000km. It's very, very coarse. Clipping population size to actual country boundaries isn't going to be very accurate. If you're "ok" with what I'd call rough population estimates, this service would be ok to use.
– KHibma
Jan 22 at 13:46
Actually you can see the source data in a map service here:https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/MapServer-- the cell size looks to be about 4km x 4km. So it might not be as bad as I thought
– KHibma
Jan 22 at 13:50
What precisely have you tried so far? Are you doing this using ArcObjects, ArcPy or another part of the Geoprocessing Framework?
– PolyGeo♦
Jan 18 at 21:25
What precisely have you tried so far? Are you doing this using ArcObjects, ArcPy or another part of the Geoprocessing Framework?
– PolyGeo♦
Jan 18 at 21:25
Cross-posted as stackoverflow.com/q/54238580/820534
– PolyGeo♦
Jan 19 at 12:18
Cross-posted as stackoverflow.com/q/54238580/820534
– PolyGeo♦
Jan 19 at 12:18
Thank you very much for your answers. Let me be more clear: I am getting an area with this : function ... () { ....(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius()} And then... { var gp = new esri.tasks.Geoprocessor("sampleserver1.arcgisonline.com/ArcGIS/rest/services/…); ... to get the total population. The problem is that some times, the circle can cover more than one country and I need to get the results by country. Does it make sense? Thank you very much!
– Roger Peñarroya i Zaldívar
Jan 22 at 12:21
Thank you very much for your answers. Let me be more clear: I am getting an area with this : function ... () { ....(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius()} And then... { var gp = new esri.tasks.Geoprocessor("sampleserver1.arcgisonline.com/ArcGIS/rest/services/…); ... to get the total population. The problem is that some times, the circle can cover more than one country and I need to get the results by country. Does it make sense? Thank you very much!
– Roger Peñarroya i Zaldívar
Jan 22 at 12:21
I can't add an answer as the question is currently locked, but I'll caution a couple things. 1) This is a sample service, I wouldn't take it as being authoritative. 2) The data in this service is probably 5+ years old 3) Population counts have been interpolated to a raster dataset. I think that raster had a cell size of 250, perhaps even 1000km. It's very, very coarse. Clipping population size to actual country boundaries isn't going to be very accurate. If you're "ok" with what I'd call rough population estimates, this service would be ok to use.
– KHibma
Jan 22 at 13:46
I can't add an answer as the question is currently locked, but I'll caution a couple things. 1) This is a sample service, I wouldn't take it as being authoritative. 2) The data in this service is probably 5+ years old 3) Population counts have been interpolated to a raster dataset. I think that raster had a cell size of 250, perhaps even 1000km. It's very, very coarse. Clipping population size to actual country boundaries isn't going to be very accurate. If you're "ok" with what I'd call rough population estimates, this service would be ok to use.
– KHibma
Jan 22 at 13:46
Actually you can see the source data in a map service here:
https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/MapServer -- the cell size looks to be about 4km x 4km. So it might not be as bad as I thought– KHibma
Jan 22 at 13:50
Actually you can see the source data in a map service here:
https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/MapServer -- the cell size looks to be about 4km x 4km. So it might not be as bad as I thought– KHibma
Jan 22 at 13:50
|
show 1 more comment
1 Answer
1
active
oldest
votes
I'm excluding the part where you're referencing Google Maps. I'm not entirely sure how that comes into play with this question.
Essentially you need to find the geometry of a country, with that you can pass that geometry into the geoprocessing service and have it use that instead of a "circle". Luckily there is a lot of data to be found on ArcGIS.com, including country boundaries.
The below code is very close to what you want to do. (It might actually work, but sampleserver1 is giving me CORS Cross domain issues and I'm not in a position to setup a proxy to make a good request. (My issue is beyond the scope of your initial question.) Below you can see that a button press starts everything. Pressing the button sets a definition express for Country = Spain. (there are many different ways to perform a query). The selected featurelayer with the definition is sent as input to the geoprocessing service. You'll get back a response and the app is responsible for popping up a text box with the output.
Remember, the code below will probably not just run, but it shows the pattern you need to undertake.
Note - pieced together from GP Zonal Stats and other feature layer samples.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/css/esri.css" />
<script src="https://js.arcgis.com/3.27/"></script>
<script>
var map;
require([
"esri/map",
"esri/layers/FeatureLayer",
"esri/symbols/SimpleFillSymbol",
"esri/symbols/SimpleLineSymbol",
"esri/tasks/Geoprocessor",
"dojo/dom",
"dojo/on",
"dojo/parser",
"dojo/string",
"esri/Color",
"dijit/registry",
"dijit/form/Button",
"dojo/domReady!"
],
function (Map, FeatureLayer, SimpleFillSymbol, SimpleLineSymbol,
Geoprocessor, dom, on, parser, string, Color, registry
) {
parser.parse();
var featureLayer, map;
map = new Map("map", {
basemap: "streets",
center: [0, 0],
zoom: 3
});
gp = new Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
gp.setOutputSpatialReference({wkid:102100});
gp.on("execute-complete", displayResults);
var fieldsSelectionSymbol =
new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,
new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,
new Color([255, 0, 0]), 2), new Color([255, 255, 0, 0.5]));
// country boundary polygons
featureLayer = new FeatureLayer("http://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/World_Countries_(Generalized)/FeatureServer/0",
{
mode: FeatureLayer.MODE_ONDEMAND,
outFields: ["*"]
});
featureLayer.setSelectionSymbol(fieldsSelectionSymbol);
map.addLayer(featureLayer);
function computeZonalStats() {
featureLayer.setDefinitionExpression("Country ='Spain'");
var params = { "inputPoly":featureLayer };
gp.execute(params);
}
function displayResults(evtObj) {
console.log(evtObj);
var results = evtObj.results;
var content = string.substitute("<h4>The population in the user defined polygon is ${number:dojo.number.format}.</h4>",{number:results[0].value.features[0].attributes.SUM});
registry.byId("dialog1").setContent(content);
registry.byId("dialog1").show();
}
app = {
computeZonalStats: computeZonalStats
};
});
</script>
</head>
<body class="claro">
<button id="querySpainButton" data-dojo-type="dijit/form/Button" onclick="app.computeZonalStats()">Query Spain</button>
<div id="map" style="position: relative; width:700px; height:500px; border:1px solid #000;"></div>
<div data-dojo-type="dijit.Dialog" id="dialog1" title="Population Summary"></div>
</body>
</html>
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
add a comment |
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1 Answer
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1 Answer
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I'm excluding the part where you're referencing Google Maps. I'm not entirely sure how that comes into play with this question.
Essentially you need to find the geometry of a country, with that you can pass that geometry into the geoprocessing service and have it use that instead of a "circle". Luckily there is a lot of data to be found on ArcGIS.com, including country boundaries.
The below code is very close to what you want to do. (It might actually work, but sampleserver1 is giving me CORS Cross domain issues and I'm not in a position to setup a proxy to make a good request. (My issue is beyond the scope of your initial question.) Below you can see that a button press starts everything. Pressing the button sets a definition express for Country = Spain. (there are many different ways to perform a query). The selected featurelayer with the definition is sent as input to the geoprocessing service. You'll get back a response and the app is responsible for popping up a text box with the output.
Remember, the code below will probably not just run, but it shows the pattern you need to undertake.
Note - pieced together from GP Zonal Stats and other feature layer samples.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/css/esri.css" />
<script src="https://js.arcgis.com/3.27/"></script>
<script>
var map;
require([
"esri/map",
"esri/layers/FeatureLayer",
"esri/symbols/SimpleFillSymbol",
"esri/symbols/SimpleLineSymbol",
"esri/tasks/Geoprocessor",
"dojo/dom",
"dojo/on",
"dojo/parser",
"dojo/string",
"esri/Color",
"dijit/registry",
"dijit/form/Button",
"dojo/domReady!"
],
function (Map, FeatureLayer, SimpleFillSymbol, SimpleLineSymbol,
Geoprocessor, dom, on, parser, string, Color, registry
) {
parser.parse();
var featureLayer, map;
map = new Map("map", {
basemap: "streets",
center: [0, 0],
zoom: 3
});
gp = new Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
gp.setOutputSpatialReference({wkid:102100});
gp.on("execute-complete", displayResults);
var fieldsSelectionSymbol =
new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,
new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,
new Color([255, 0, 0]), 2), new Color([255, 255, 0, 0.5]));
// country boundary polygons
featureLayer = new FeatureLayer("http://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/World_Countries_(Generalized)/FeatureServer/0",
{
mode: FeatureLayer.MODE_ONDEMAND,
outFields: ["*"]
});
featureLayer.setSelectionSymbol(fieldsSelectionSymbol);
map.addLayer(featureLayer);
function computeZonalStats() {
featureLayer.setDefinitionExpression("Country ='Spain'");
var params = { "inputPoly":featureLayer };
gp.execute(params);
}
function displayResults(evtObj) {
console.log(evtObj);
var results = evtObj.results;
var content = string.substitute("<h4>The population in the user defined polygon is ${number:dojo.number.format}.</h4>",{number:results[0].value.features[0].attributes.SUM});
registry.byId("dialog1").setContent(content);
registry.byId("dialog1").show();
}
app = {
computeZonalStats: computeZonalStats
};
});
</script>
</head>
<body class="claro">
<button id="querySpainButton" data-dojo-type="dijit/form/Button" onclick="app.computeZonalStats()">Query Spain</button>
<div id="map" style="position: relative; width:700px; height:500px; border:1px solid #000;"></div>
<div data-dojo-type="dijit.Dialog" id="dialog1" title="Population Summary"></div>
</body>
</html>
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
add a comment |
I'm excluding the part where you're referencing Google Maps. I'm not entirely sure how that comes into play with this question.
Essentially you need to find the geometry of a country, with that you can pass that geometry into the geoprocessing service and have it use that instead of a "circle". Luckily there is a lot of data to be found on ArcGIS.com, including country boundaries.
The below code is very close to what you want to do. (It might actually work, but sampleserver1 is giving me CORS Cross domain issues and I'm not in a position to setup a proxy to make a good request. (My issue is beyond the scope of your initial question.) Below you can see that a button press starts everything. Pressing the button sets a definition express for Country = Spain. (there are many different ways to perform a query). The selected featurelayer with the definition is sent as input to the geoprocessing service. You'll get back a response and the app is responsible for popping up a text box with the output.
Remember, the code below will probably not just run, but it shows the pattern you need to undertake.
Note - pieced together from GP Zonal Stats and other feature layer samples.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/css/esri.css" />
<script src="https://js.arcgis.com/3.27/"></script>
<script>
var map;
require([
"esri/map",
"esri/layers/FeatureLayer",
"esri/symbols/SimpleFillSymbol",
"esri/symbols/SimpleLineSymbol",
"esri/tasks/Geoprocessor",
"dojo/dom",
"dojo/on",
"dojo/parser",
"dojo/string",
"esri/Color",
"dijit/registry",
"dijit/form/Button",
"dojo/domReady!"
],
function (Map, FeatureLayer, SimpleFillSymbol, SimpleLineSymbol,
Geoprocessor, dom, on, parser, string, Color, registry
) {
parser.parse();
var featureLayer, map;
map = new Map("map", {
basemap: "streets",
center: [0, 0],
zoom: 3
});
gp = new Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
gp.setOutputSpatialReference({wkid:102100});
gp.on("execute-complete", displayResults);
var fieldsSelectionSymbol =
new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,
new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,
new Color([255, 0, 0]), 2), new Color([255, 255, 0, 0.5]));
// country boundary polygons
featureLayer = new FeatureLayer("http://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/World_Countries_(Generalized)/FeatureServer/0",
{
mode: FeatureLayer.MODE_ONDEMAND,
outFields: ["*"]
});
featureLayer.setSelectionSymbol(fieldsSelectionSymbol);
map.addLayer(featureLayer);
function computeZonalStats() {
featureLayer.setDefinitionExpression("Country ='Spain'");
var params = { "inputPoly":featureLayer };
gp.execute(params);
}
function displayResults(evtObj) {
console.log(evtObj);
var results = evtObj.results;
var content = string.substitute("<h4>The population in the user defined polygon is ${number:dojo.number.format}.</h4>",{number:results[0].value.features[0].attributes.SUM});
registry.byId("dialog1").setContent(content);
registry.byId("dialog1").show();
}
app = {
computeZonalStats: computeZonalStats
};
});
</script>
</head>
<body class="claro">
<button id="querySpainButton" data-dojo-type="dijit/form/Button" onclick="app.computeZonalStats()">Query Spain</button>
<div id="map" style="position: relative; width:700px; height:500px; border:1px solid #000;"></div>
<div data-dojo-type="dijit.Dialog" id="dialog1" title="Population Summary"></div>
</body>
</html>
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
add a comment |
I'm excluding the part where you're referencing Google Maps. I'm not entirely sure how that comes into play with this question.
Essentially you need to find the geometry of a country, with that you can pass that geometry into the geoprocessing service and have it use that instead of a "circle". Luckily there is a lot of data to be found on ArcGIS.com, including country boundaries.
The below code is very close to what you want to do. (It might actually work, but sampleserver1 is giving me CORS Cross domain issues and I'm not in a position to setup a proxy to make a good request. (My issue is beyond the scope of your initial question.) Below you can see that a button press starts everything. Pressing the button sets a definition express for Country = Spain. (there are many different ways to perform a query). The selected featurelayer with the definition is sent as input to the geoprocessing service. You'll get back a response and the app is responsible for popping up a text box with the output.
Remember, the code below will probably not just run, but it shows the pattern you need to undertake.
Note - pieced together from GP Zonal Stats and other feature layer samples.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/css/esri.css" />
<script src="https://js.arcgis.com/3.27/"></script>
<script>
var map;
require([
"esri/map",
"esri/layers/FeatureLayer",
"esri/symbols/SimpleFillSymbol",
"esri/symbols/SimpleLineSymbol",
"esri/tasks/Geoprocessor",
"dojo/dom",
"dojo/on",
"dojo/parser",
"dojo/string",
"esri/Color",
"dijit/registry",
"dijit/form/Button",
"dojo/domReady!"
],
function (Map, FeatureLayer, SimpleFillSymbol, SimpleLineSymbol,
Geoprocessor, dom, on, parser, string, Color, registry
) {
parser.parse();
var featureLayer, map;
map = new Map("map", {
basemap: "streets",
center: [0, 0],
zoom: 3
});
gp = new Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
gp.setOutputSpatialReference({wkid:102100});
gp.on("execute-complete", displayResults);
var fieldsSelectionSymbol =
new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,
new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,
new Color([255, 0, 0]), 2), new Color([255, 255, 0, 0.5]));
// country boundary polygons
featureLayer = new FeatureLayer("http://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/World_Countries_(Generalized)/FeatureServer/0",
{
mode: FeatureLayer.MODE_ONDEMAND,
outFields: ["*"]
});
featureLayer.setSelectionSymbol(fieldsSelectionSymbol);
map.addLayer(featureLayer);
function computeZonalStats() {
featureLayer.setDefinitionExpression("Country ='Spain'");
var params = { "inputPoly":featureLayer };
gp.execute(params);
}
function displayResults(evtObj) {
console.log(evtObj);
var results = evtObj.results;
var content = string.substitute("<h4>The population in the user defined polygon is ${number:dojo.number.format}.</h4>",{number:results[0].value.features[0].attributes.SUM});
registry.byId("dialog1").setContent(content);
registry.byId("dialog1").show();
}
app = {
computeZonalStats: computeZonalStats
};
});
</script>
</head>
<body class="claro">
<button id="querySpainButton" data-dojo-type="dijit/form/Button" onclick="app.computeZonalStats()">Query Spain</button>
<div id="map" style="position: relative; width:700px; height:500px; border:1px solid #000;"></div>
<div data-dojo-type="dijit.Dialog" id="dialog1" title="Population Summary"></div>
</body>
</html>
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
I'm excluding the part where you're referencing Google Maps. I'm not entirely sure how that comes into play with this question.
Essentially you need to find the geometry of a country, with that you can pass that geometry into the geoprocessing service and have it use that instead of a "circle". Luckily there is a lot of data to be found on ArcGIS.com, including country boundaries.
The below code is very close to what you want to do. (It might actually work, but sampleserver1 is giving me CORS Cross domain issues and I'm not in a position to setup a proxy to make a good request. (My issue is beyond the scope of your initial question.) Below you can see that a button press starts everything. Pressing the button sets a definition express for Country = Spain. (there are many different ways to perform a query). The selected featurelayer with the definition is sent as input to the geoprocessing service. You'll get back a response and the app is responsible for popping up a text box with the output.
Remember, the code below will probably not just run, but it shows the pattern you need to undertake.
Note - pieced together from GP Zonal Stats and other feature layer samples.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/dijit/themes/claro/claro.css">
<link rel="stylesheet" href="https://js.arcgis.com/3.27/esri/css/esri.css" />
<script src="https://js.arcgis.com/3.27/"></script>
<script>
var map;
require([
"esri/map",
"esri/layers/FeatureLayer",
"esri/symbols/SimpleFillSymbol",
"esri/symbols/SimpleLineSymbol",
"esri/tasks/Geoprocessor",
"dojo/dom",
"dojo/on",
"dojo/parser",
"dojo/string",
"esri/Color",
"dijit/registry",
"dijit/form/Button",
"dojo/domReady!"
],
function (Map, FeatureLayer, SimpleFillSymbol, SimpleLineSymbol,
Geoprocessor, dom, on, parser, string, Color, registry
) {
parser.parse();
var featureLayer, map;
map = new Map("map", {
basemap: "streets",
center: [0, 0],
zoom: 3
});
gp = new Geoprocessor("https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/GPServer/PopulationSummary");
gp.setOutputSpatialReference({wkid:102100});
gp.on("execute-complete", displayResults);
var fieldsSelectionSymbol =
new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID,
new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASHDOT,
new Color([255, 0, 0]), 2), new Color([255, 255, 0, 0.5]));
// country boundary polygons
featureLayer = new FeatureLayer("http://services.arcgis.com/P3ePLMYs2RVChkJx/arcgis/rest/services/World_Countries_(Generalized)/FeatureServer/0",
{
mode: FeatureLayer.MODE_ONDEMAND,
outFields: ["*"]
});
featureLayer.setSelectionSymbol(fieldsSelectionSymbol);
map.addLayer(featureLayer);
function computeZonalStats() {
featureLayer.setDefinitionExpression("Country ='Spain'");
var params = { "inputPoly":featureLayer };
gp.execute(params);
}
function displayResults(evtObj) {
console.log(evtObj);
var results = evtObj.results;
var content = string.substitute("<h4>The population in the user defined polygon is ${number:dojo.number.format}.</h4>",{number:results[0].value.features[0].attributes.SUM});
registry.byId("dialog1").setContent(content);
registry.byId("dialog1").show();
}
app = {
computeZonalStats: computeZonalStats
};
});
</script>
</head>
<body class="claro">
<button id="querySpainButton" data-dojo-type="dijit/form/Button" onclick="app.computeZonalStats()">Query Spain</button>
<div id="map" style="position: relative; width:700px; height:500px; border:1px solid #000;"></div>
<div data-dojo-type="dijit.Dialog" id="dialog1" title="Population Summary"></div>
</body>
</html>
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
answered Jan 22 at 19:27
KHibmaKHibma
10.2k11839
10.2k11839
add a comment |
add a comment |
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What precisely have you tried so far? Are you doing this using ArcObjects, ArcPy or another part of the Geoprocessing Framework?
– PolyGeo♦
Jan 18 at 21:25
Cross-posted as stackoverflow.com/q/54238580/820534
– PolyGeo♦
Jan 19 at 12:18
Thank you very much for your answers. Let me be more clear: I am getting an area with this : function ... () { ....(selectedShape.center.lat(),selectedShape.center.lng(),selectedShape.getRadius()} And then... { var gp = new esri.tasks.Geoprocessor("sampleserver1.arcgisonline.com/ArcGIS/rest/services/…); ... to get the total population. The problem is that some times, the circle can cover more than one country and I need to get the results by country. Does it make sense? Thank you very much!
– Roger Peñarroya i Zaldívar
Jan 22 at 12:21
I can't add an answer as the question is currently locked, but I'll caution a couple things. 1) This is a sample service, I wouldn't take it as being authoritative. 2) The data in this service is probably 5+ years old 3) Population counts have been interpolated to a raster dataset. I think that raster had a cell size of 250, perhaps even 1000km. It's very, very coarse. Clipping population size to actual country boundaries isn't going to be very accurate. If you're "ok" with what I'd call rough population estimates, this service would be ok to use.
– KHibma
Jan 22 at 13:46
Actually you can see the source data in a map service here:
https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Population_World/MapServer-- the cell size looks to be about 4km x 4km. So it might not be as bad as I thought– KHibma
Jan 22 at 13:50