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How to show two sets of points from two different fields in QGIS?
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I made a union of two adjacent shp (points) files with the same theme (Geochemistry) so the resulting attribute table gave duplicated fields, for example: ID, As_ppm, Ag_ppm, Pb_ppm, ... , ID_2, As_ppm_2, Ag_ppm_2, Pb_ppm_2,...
And the elements of the first shp give 'NULL' in the fields of the second shp and vice-versa, As in the screenshot.
So my goal is to show the combined points for a speciffic element, say Arsenic, so I have tried, without success, expressions like As_ppm || As_ppm_2 , As_ppm + As_ppm_2, combine(As_ppm ,As_ppm_2).
qgis shapefile point attribute-table map-algebra
edited 6 mins ago
Vince
14.8k32850
asked 1 hour ago
cavereapercavereaper
133
add a comment |
I made a union of two adjacent shp (points) files with the same theme (Geochemistry) so the resulting attribute table gave duplicated fields, for example: ID, As_ppm, Ag_ppm, Pb_ppm, ... , ID_2, As_ppm_2, Ag_ppm_2, Pb_ppm_2,...
And the elements of the first shp give 'NULL' in the fields of the second shp and vice-versa, As in the screenshot.
So my goal is to show the combined points for a speciffic element, say Arsenic, so I have tried, without success, expressions like As_ppm || As_ppm_2 , As_ppm + As_ppm_2, combine(As_ppm ,As_ppm_2).
qgis shapefile point attribute-table map-algebra
edited 6 mins ago
Vince
14.8k32850
asked 1 hour ago
cavereapercavereaper
133
add a comment |
I made a union of two adjacent shp (points) files with the same theme (Geochemistry) so the resulting attribute table gave duplicated fields, for example: ID, As_ppm, Ag_ppm, Pb_ppm, ... , ID_2, As_ppm_2, Ag_ppm_2, Pb_ppm_2,...
And the elements of the first shp give 'NULL' in the fields of the second shp and vice-versa, As in the screenshot.
So my goal is to show the combined points for a speciffic element, say Arsenic, so I have tried, without success, expressions like As_ppm || As_ppm_2 , As_ppm + As_ppm_2, combine(As_ppm ,As_ppm_2).
qgis shapefile point attribute-table map-algebra
edited 6 mins ago
Vince
14.8k32850
asked 1 hour ago
cavereapercavereaper
133
I made a union of two adjacent shp (points) files with the same theme (Geochemistry) so the resulting attribute table gave duplicated fields, for example: ID, As_ppm, Ag_ppm, Pb_ppm, ... , ID_2, As_ppm_2, Ag_ppm_2, Pb_ppm_2,...
And the elements of the first shp give 'NULL' in the fields of the second shp and vice-versa, As in the screenshot.
So my goal is to show the combined points for a speciffic element, say Arsenic, so I have tried, without success, expressions like As_ppm || As_ppm_2 , As_ppm + As_ppm_2, combine(As_ppm ,As_ppm_2).
qgis shapefile point attribute-table map-algebra
qgis shapefile point attribute-table map-algebra
edited 6 mins ago
Vince
14.8k32850
asked 1 hour ago
cavereapercavereaper
133
edited 6 mins ago
Vince
14.8k32850
asked 1 hour ago
cavereapercavereaper
133
edited 6 mins ago
Vince
14.8k32850
edited 6 mins ago
Vince
14.8k32850
edited 6 mins ago
Vince
14.8k32850
14.8k32850
asked 1 hour ago
cavereapercavereaper
133
asked 1 hour ago
cavereapercavereaper
133
asked 1 hour ago
cavereapercavereaper
133
133
add a comment |
add a comment |
1 Answer
1
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oldest
votes
Union (geoprocessing) feature make a "union" of 2 dataset (C = A united to B).
Probably you are tring to JOIN two dataset.
Try this:
- Go to JOIN settings: (right click -> properties -> Join)
- Add Vector Join of the second layer (click on "+" green-plus icon) and set these parameters:
- Join Layer: "the second layer to join"
- Join field: "ID"
- Join Target: "ID"
We assume that "ID" is and unambiguous identifier for both the layer's elements.
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Union (geoprocessing) feature make a "union" of 2 dataset (C = A united to B).
Probably you are tring to JOIN two dataset.
Try this:
- Go to JOIN settings: (right click -> properties -> Join)
- Add Vector Join of the second layer (click on "+" green-plus icon) and set these parameters:
- Join Layer: "the second layer to join"
- Join field: "ID"
- Join Target: "ID"
We assume that "ID" is and unambiguous identifier for both the layer's elements.
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
add a comment |
Union (geoprocessing) feature make a "union" of 2 dataset (C = A united to B).
Probably you are tring to JOIN two dataset.
Try this:
- Go to JOIN settings: (right click -> properties -> Join)
- Add Vector Join of the second layer (click on "+" green-plus icon) and set these parameters:
- Join Layer: "the second layer to join"
- Join field: "ID"
- Join Target: "ID"
We assume that "ID" is and unambiguous identifier for both the layer's elements.
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
add a comment |
Union (geoprocessing) feature make a "union" of 2 dataset (C = A united to B).
Probably you are tring to JOIN two dataset.
Try this:
- Go to JOIN settings: (right click -> properties -> Join)
- Add Vector Join of the second layer (click on "+" green-plus icon) and set these parameters:
- Join Layer: "the second layer to join"
- Join field: "ID"
- Join Target: "ID"
We assume that "ID" is and unambiguous identifier for both the layer's elements.
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
Union (geoprocessing) feature make a "union" of 2 dataset (C = A united to B).
Probably you are tring to JOIN two dataset.
Try this:
- Go to JOIN settings: (right click -> properties -> Join)
- Add Vector Join of the second layer (click on "+" green-plus icon) and set these parameters:
- Join Layer: "the second layer to join"
- Join field: "ID"
- Join Target: "ID"
We assume that "ID" is and unambiguous identifier for both the layer's elements.
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
answered 3 mins ago
gianfranco di pietrogianfranco di pietro
134
134
add a comment |
add a comment |
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