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Python script for calculating the area of a polygon

How do I calculate polygon area with arcobjects?Calculate area within Python script in ArcMapArea of an EPSG 27700 polygonCalculating area of polygon inside region?largest area polygonCalculating relative share of area covered by water/percentage of polygon area that overlaps in ArcGIS for Desktop?Calculating area of polygon within Buffers in ArcGIS for Desktop?Calculating area of user defined polygon in openstreetmap using pythonCalculating polygon area inside another polygon in QGISCalculating polygon area within polygons in QGIS?

0

I am looking for a python code for this polygon. I need to calculate the area inside this polygon and I am new to programming. (Very new). Can anybody assist me with this? I have to use a python code for this, I cannot use any other means.

arcpy polygon area

share|improve this question

edited Jul 5 '17 at 7:02

Fezter♦

16.6k105398

asked Apr 30 '15 at 23:43

user51399

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Your title mentions Perimeter and yet your question asks about Area. In any event, if your polygon is in a file geodatabase you should be able to read both from the attribute table, or if it is in a shapefile just add two fields and use Calculate Geometry.
  
  – PolyGeo♦
  Apr 30 '15 at 23:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi, yea I meant to say calculate the area inside the polygon. I was able to show the area just by using the measurement tool. The problem is that I have to show a python code for this process.
  
  – user51399
  Apr 30 '15 at 23:57
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  As an added bonus the Calculate Geometry will do perimeter or area in a different spatial reference and several units... particularly handy if you data is in WGS84 and you need to know how many acres it is, without having to remember how many square feet is it in an acre. There's a discourse on how to do it in python here help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//…
  
  – Michael Stimson
  Apr 30 '15 at 23:59
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please use the edit button to provide clarifications/corrections to your question. The parts of a question are described at meta.gis.stackexchange.com/a/3353. I suspect Python code to do this will involve using a SearchCursor the read the aforementioned fields.
  
  – PolyGeo♦
  Apr 30 '15 at 23:59
  
  
  

  
  
  
  

add a comment | 

0

I am looking for a python code for this polygon. I need to calculate the area inside this polygon and I am new to programming. (Very new). Can anybody assist me with this? I have to use a python code for this, I cannot use any other means.

arcpy polygon area

share|improve this question

edited Jul 5 '17 at 7:02

Fezter♦

16.6k105398

asked Apr 30 '15 at 23:43

user51399

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Your title mentions Perimeter and yet your question asks about Area. In any event, if your polygon is in a file geodatabase you should be able to read both from the attribute table, or if it is in a shapefile just add two fields and use Calculate Geometry.
  
  – PolyGeo♦
  Apr 30 '15 at 23:53
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi, yea I meant to say calculate the area inside the polygon. I was able to show the area just by using the measurement tool. The problem is that I have to show a python code for this process.
  
  – user51399
  Apr 30 '15 at 23:57
  

  
  
  
  


• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  As an added bonus the Calculate Geometry will do perimeter or area in a different spatial reference and several units... particularly handy if you data is in WGS84 and you need to know how many acres it is, without having to remember how many square feet is it in an acre. There's a discourse on how to do it in python here help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//…
  
  – Michael Stimson
  Apr 30 '15 at 23:59
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Please use the edit button to provide clarifications/corrections to your question. The parts of a question are described at meta.gis.stackexchange.com/a/3353. I suspect Python code to do this will involve using a SearchCursor the read the aforementioned fields.
  
  – PolyGeo♦
  Apr 30 '15 at 23:59
  
  
  

  
  
  
  

add a comment | 

I am looking for a python code for this polygon. I need to calculate the area inside this polygon and I am new to programming. (Very new). Can anybody assist me with this? I have to use a python code for this, I cannot use any other means.

arcpy polygon area

share|improve this question

edited Jul 5 '17 at 7:02

Fezter♦

16.6k105398

asked Apr 30 '15 at 23:43

user51399

share|improve this question

edited Jul 5 '17 at 7:02

Fezter♦

16.6k105398

asked Apr 30 '15 at 23:43

user51399

share|improve this question

edited Jul 5 '17 at 7:02

Fezter♦

16.6k105398

asked Apr 30 '15 at 23:43

user51399

edited Jul 5 '17 at 7:02

Fezter♦

16.6k105398

edited Jul 5 '17 at 7:02

Fezter♦

16.6k105398

3 Answers
3

active

oldest

votes

7

Here's an example of how you could get the area using a search cursor:

polygon_layer = "C:\Polygon.shp"



with arcpy.da.SearchCursor(polygon_layer, ("OID@", "SHAPE@")) as search_cursor:

    for row in search_cursor:

        oid = row[0]

        geometry = row[1]



        print "OID {0}: area is {1}".format(oid, geometry.area)

share|improve this answer

edited May 1 '15 at 0:12

answered May 1 '15 at 0:07

ianbroadianbroad

7,43233374

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Could use the 'SHAPE@AREA' token too, and will be a bit faster.
  
  – DWynne
  May 4 '15 at 16:27
  
  
  

  
  
  
  

add a comment | 

0

import os

from osgeo import ogr



daShapefile = r"C:Usersnew1.shp" #path where your shape file is present 



driver = ogr.GetDriverByName('ESRI Shapefile')



dataSource = driver.Open(daShapefile,1) # 0 means read-only. 1 means writeable.



# Check to see if shapefile is found.

if dataSource is None:

    print 'Could not open %s' % (daShapefile)

else:

    print 'Opened %s' % (daShapefile)

    layer = dataSource.GetLayer()

    featureCount = layer.GetFeatureCount()

    print "Number of features in %s: %d" % (os.path.basename(daShapefile),featureCount)

    print "n"





new_field = ogr.FieldDefn("Area", ogr.OFTReal)

new_field.SetWidth(32)

new_field.SetPrecision(2) #added line to set precision

layer.CreateField(new_field)



for feature in layer:

    geom = feature.GetGeometryRef()

    area = geom.GetArea() 

    print area

    feature.SetField("Area", area)

    layer.SetFeature(feature)

'''
this code here finds the area of the polygons present in your shape file and adds a field named "Area" to your database with the value of the area of each polygon

share|improve this answer

edited Jul 5 '17 at 6:17

LaughU

3,16441232

answered Jul 5 '17 at 5:57

asteriskasterisk

1

add a comment | 

0

same as the accepted answer but it is a one-liner.

area = arcpy.da.FeatureClassToNumPyArray(polygon_layer, 'SHAPE@AREA')[0][0]

share

answered 59 secs ago

dfresh22dfresh22

1012

New contributor

dfresh22 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

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7

Here's an example of how you could get the area using a search cursor:

polygon_layer = "C:\Polygon.shp"



with arcpy.da.SearchCursor(polygon_layer, ("OID@", "SHAPE@")) as search_cursor:

    for row in search_cursor:

        oid = row[0]

        geometry = row[1]



        print "OID {0}: area is {1}".format(oid, geometry.area)

share|improve this answer

edited May 1 '15 at 0:12

answered May 1 '15 at 0:07

ianbroadianbroad

7,43233374

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Could use the 'SHAPE@AREA' token too, and will be a bit faster.
  
  – DWynne
  May 4 '15 at 16:27
  
  
  

  
  
  
  

add a comment | 

7

Here's an example of how you could get the area using a search cursor:

polygon_layer = "C:\Polygon.shp"



with arcpy.da.SearchCursor(polygon_layer, ("OID@", "SHAPE@")) as search_cursor:

    for row in search_cursor:

        oid = row[0]

        geometry = row[1]



        print "OID {0}: area is {1}".format(oid, geometry.area)

share|improve this answer

edited May 1 '15 at 0:12

answered May 1 '15 at 0:07

ianbroadianbroad

7,43233374

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Could use the 'SHAPE@AREA' token too, and will be a bit faster.
  
  – DWynne
  May 4 '15 at 16:27
  
  
  

  
  
  
  

add a comment | 

Here's an example of how you could get the area using a search cursor:

polygon_layer = "C:\Polygon.shp"



with arcpy.da.SearchCursor(polygon_layer, ("OID@", "SHAPE@")) as search_cursor:

    for row in search_cursor:

        oid = row[0]

        geometry = row[1]



        print "OID {0}: area is {1}".format(oid, geometry.area)

share|improve this answer

edited May 1 '15 at 0:12

answered May 1 '15 at 0:07

ianbroadianbroad

7,43233374

polygon_layer = "C:\Polygon.shp"



with arcpy.da.SearchCursor(polygon_layer, ("OID@", "SHAPE@")) as search_cursor:

    for row in search_cursor:

        oid = row[0]

        geometry = row[1]



        print "OID {0}: area is {1}".format(oid, geometry.area)

share|improve this answer

edited May 1 '15 at 0:12

answered May 1 '15 at 0:07

ianbroadianbroad

7,43233374

answered May 1 '15 at 0:07

ianbroadianbroad

7,43233374

answered May 1 '15 at 0:07

ianbroadianbroad

7,43233374

0

import os

from osgeo import ogr



daShapefile = r"C:Usersnew1.shp" #path where your shape file is present 



driver = ogr.GetDriverByName('ESRI Shapefile')



dataSource = driver.Open(daShapefile,1) # 0 means read-only. 1 means writeable.



# Check to see if shapefile is found.

if dataSource is None:

    print 'Could not open %s' % (daShapefile)

else:

    print 'Opened %s' % (daShapefile)

    layer = dataSource.GetLayer()

    featureCount = layer.GetFeatureCount()

    print "Number of features in %s: %d" % (os.path.basename(daShapefile),featureCount)

    print "n"





new_field = ogr.FieldDefn("Area", ogr.OFTReal)

new_field.SetWidth(32)

new_field.SetPrecision(2) #added line to set precision

layer.CreateField(new_field)



for feature in layer:

    geom = feature.GetGeometryRef()

    area = geom.GetArea() 

    print area

    feature.SetField("Area", area)

    layer.SetFeature(feature)

'''
this code here finds the area of the polygons present in your shape file and adds a field named "Area" to your database with the value of the area of each polygon

share|improve this answer

edited Jul 5 '17 at 6:17

LaughU

3,16441232

answered Jul 5 '17 at 5:57

asteriskasterisk

1

add a comment | 

0

import os

from osgeo import ogr



daShapefile = r"C:Usersnew1.shp" #path where your shape file is present 



driver = ogr.GetDriverByName('ESRI Shapefile')



dataSource = driver.Open(daShapefile,1) # 0 means read-only. 1 means writeable.



# Check to see if shapefile is found.

if dataSource is None:

    print 'Could not open %s' % (daShapefile)

else:

    print 'Opened %s' % (daShapefile)

    layer = dataSource.GetLayer()

    featureCount = layer.GetFeatureCount()

    print "Number of features in %s: %d" % (os.path.basename(daShapefile),featureCount)

    print "n"





new_field = ogr.FieldDefn("Area", ogr.OFTReal)

new_field.SetWidth(32)

new_field.SetPrecision(2) #added line to set precision

layer.CreateField(new_field)



for feature in layer:

    geom = feature.GetGeometryRef()

    area = geom.GetArea() 

    print area

    feature.SetField("Area", area)

    layer.SetFeature(feature)

'''
this code here finds the area of the polygons present in your shape file and adds a field named "Area" to your database with the value of the area of each polygon

share|improve this answer

edited Jul 5 '17 at 6:17

LaughU

3,16441232

answered Jul 5 '17 at 5:57

asteriskasterisk

1

add a comment | 

import os

from osgeo import ogr



daShapefile = r"C:Usersnew1.shp" #path where your shape file is present 



driver = ogr.GetDriverByName('ESRI Shapefile')



dataSource = driver.Open(daShapefile,1) # 0 means read-only. 1 means writeable.



# Check to see if shapefile is found.

if dataSource is None:

    print 'Could not open %s' % (daShapefile)

else:

    print 'Opened %s' % (daShapefile)

    layer = dataSource.GetLayer()

    featureCount = layer.GetFeatureCount()

    print "Number of features in %s: %d" % (os.path.basename(daShapefile),featureCount)

    print "n"





new_field = ogr.FieldDefn("Area", ogr.OFTReal)

new_field.SetWidth(32)

new_field.SetPrecision(2) #added line to set precision

layer.CreateField(new_field)



for feature in layer:

    geom = feature.GetGeometryRef()

    area = geom.GetArea() 

    print area

    feature.SetField("Area", area)

    layer.SetFeature(feature)

'''
this code here finds the area of the polygons present in your shape file and adds a field named "Area" to your database with the value of the area of each polygon

share|improve this answer

edited Jul 5 '17 at 6:17

LaughU

3,16441232

answered Jul 5 '17 at 5:57

asteriskasterisk

1

import os

from osgeo import ogr



daShapefile = r"C:Usersnew1.shp" #path where your shape file is present 



driver = ogr.GetDriverByName('ESRI Shapefile')



dataSource = driver.Open(daShapefile,1) # 0 means read-only. 1 means writeable.



# Check to see if shapefile is found.

if dataSource is None:

    print 'Could not open %s' % (daShapefile)

else:

    print 'Opened %s' % (daShapefile)

    layer = dataSource.GetLayer()

    featureCount = layer.GetFeatureCount()

    print "Number of features in %s: %d" % (os.path.basename(daShapefile),featureCount)

    print "n"





new_field = ogr.FieldDefn("Area", ogr.OFTReal)

new_field.SetWidth(32)

new_field.SetPrecision(2) #added line to set precision

layer.CreateField(new_field)



for feature in layer:

    geom = feature.GetGeometryRef()

    area = geom.GetArea() 

    print area

    feature.SetField("Area", area)

    layer.SetFeature(feature)

share|improve this answer

edited Jul 5 '17 at 6:17

LaughU

3,16441232

answered Jul 5 '17 at 5:57

asteriskasterisk

1

edited Jul 5 '17 at 6:17

LaughU

3,16441232

edited Jul 5 '17 at 6:17

LaughU

3,16441232

answered Jul 5 '17 at 5:57

asteriskasterisk

1

answered Jul 5 '17 at 5:57

asteriskasterisk

1

0

same as the accepted answer but it is a one-liner.

area = arcpy.da.FeatureClassToNumPyArray(polygon_layer, 'SHAPE@AREA')[0][0]

share

answered 59 secs ago

dfresh22dfresh22

1012

New contributor

dfresh22 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

0

same as the accepted answer but it is a one-liner.

area = arcpy.da.FeatureClassToNumPyArray(polygon_layer, 'SHAPE@AREA')[0][0]

share

answered 59 secs ago

dfresh22dfresh22

1012

New contributor

dfresh22 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

same as the accepted answer but it is a one-liner.

area = arcpy.da.FeatureClassToNumPyArray(polygon_layer, 'SHAPE@AREA')[0][0]

share

answered 59 secs ago

dfresh22dfresh22

1012

New contributor

dfresh22 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share

answered 59 secs ago

dfresh22dfresh22

1012

New contributor

dfresh22 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 59 secs ago

dfresh22dfresh22

1012

New contributor

dfresh22 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 59 secs ago

dfresh22dfresh22

1012