The selection of data from a database based on some criteria.

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2
votes
0answers
134 views

GeoTools, add column in query with CQL

I'm trying to query the database (DataStore) and want to let the datastore calculate a value for me. In SQL I would do it like this: SELECT name, ST_Area(ST_Intersection(the_geom, ....) AS myValue ...
3
votes
2answers
520 views

Unable to select Vector Layer

I am using the following example, to select a vector layer feature on click. The example demonstrates Highlighting and selecting the layer. I was able to successfully implement the Highlighting of the ...
0
votes
1answer
797 views

Is there a Select Feature by Attribute tool for Feature Classes when performing selection ModelBuilder?

I want to perform a Select by Attribute selection on a Feature Class in ModelBuilder, but I know the Select by Attribute tool does not work in this situation. I need to perform this function as I ...
10
votes
1answer
3k views

When iterating over a vector layer with pyqgis, how do I check whether a feature is selected?

While iterating over a vector layer using the following code (summerized from the example in the pyqgis cookbook), is there a way to check whether a feature is selected? provider = ...
3
votes
2answers
164 views

How can I select “ultimate perimeter” from a group of connected lines?

I have a number of drawings which I converted into geodatabase feature classes. Most drawings are composed or connected 3D polylines from which I want to construct TIN surfaces and multipatch ...
3
votes
2answers
653 views

Problem with multiple feature selection

In an attempt to retrieve all features (point geometry) that fall in a selected polygon, I get the error this.layer.addFeatures is not a function. My code is as shown below: function ...
2
votes
2answers
615 views

Selecting Part of a Polygon

I have a dataset, in shapefile format, for agricultural land grades in England. It is divided into 7 categories in its attribute table. As the file is a large file and I only want a small section I ...
2
votes
0answers
283 views

Select only features within the layout view

I want to create a tool layer in ArcGIS10 that will select only features within the current layout view so that I can add the attribute table to the layout and only show attributes for the selected ...
2
votes
1answer
375 views

OpenLayers deploy: what libs does selectFeature rely on?

I am trying to minimize my code by modifying OpenLayers deploy configuration file in order to reduce its load time. However, It seems that I can't include all necessary libs that ...
3
votes
4answers
2k views

How do I create a mask where the masked area can be changed by selection?

I'm working on making a mask in QGIS to have one area(county A) outlined while the other areas(counties) are under a semipermeable layer. I already know how to do this for one selected area. But my ...
1
vote
1answer
147 views

Button that allows project search and zooms to site once executed

I am trying to create a button that will execute a Python script. I have limited Python experience. What we are trying to accomplish is to recreate these steps: Query on project Site and Radius ...
2
votes
2answers
715 views

Zoom to Selected feature, without using 'current' in python

I am wondering if it is possible to build a zoom to geoprocessing service without using 'current' for the mxd variable in pyhton. Using 'current' my tool works in arcmap, but not in my gp service. ...
1
vote
2answers
1k views

How to modifiy how selection highlights are displayed? [closed]

I have got a layer of points that are showed with a litlle symbol. When I select one, a red square comes around it. The problem is that this points are inside other layers (polygons) and some of them ...
0
votes
1answer
155 views

Selection not displaying all results in QGIS

I have a point layer. Of which I have just selected 15 points from the attribute table manually and say show selected attributes. Of these 15 one point does not get highlighted the rest do fine. When ...
3
votes
1answer
947 views

How do I fire a function after all features have been selected by a box in OpenLayers?

I have a map rendering with Polygons on a Vector layer set up as features. I set up the features so they fire off a function when the feature is selected and this works fine. The issue I'm having is ...
2
votes
3answers
655 views

Select “interior” lines of a polygon-to-line layer

I have a polygon featureclass that has adjacent features. Using Arc10, I am turning those polygons into lines using the "Featureclass to Lines" tool. Now I would like to select ONLY THE INTERIOR ...
4
votes
1answer
3k views

How to select and copy a group of polygons in QGIS?

I'm new to QGIS. I opened a few shapefiles that cover Europe. Now I want to select a smaller area and if possible copy the polygons in this area so I can work with a smaller set. How should I do this ...
4
votes
4answers
5k views

Automate Select by Location

I have 2 shape files (A and B) each with thousands of polygons. I want to select polygons from A which intersect a specific polygon from B, and save the selected polygons from A as a new shapefile. I ...
6
votes
1answer
3k views

How to select multiple Features from multiple Layers in OpenLayers?

Is there a way to select multiple features from multiple vector layers by using clickTolerance in click? I checked the documents of getFeature control and selectFeature control, seems not work in ...