The extraction of data from a database based on some criteria.
27
votes
2answers
829 views
Is there a “Select by Attributes” plugin/widget for ArcGIS Server JS API?
I'm hoping to find some existing code which emulates the "Select by Attributes" dialog in ArcMap, within the ArcGIS Server JavaScript API.
Writing a hard-coded QueryTask is easy - I'm looking for ...
9
votes
3answers
2k views
What is quickest way to select polygon by point in ArcGIS 10 using ArcPy?
I keep thinking that I must be missing something, but there does not seem to be a tool in ArcGIS 10 to select features (in particular polygons) from a layer at a point (X,Y) location via ArcPy. The ...
6
votes
2answers
452 views
Can I get a list of my selected features in ArcGIS by using Python code?
I have a question regarding selections in ArcGIS. Assumed I have one layer in ArcMap and I have selected two of five features. Is it possible to get a list of all selected features by using Python? It ...
6
votes
1answer
2k views
How to choose selectable layers in ArcMap 10?
Maybe I'm missing something, but I cannot figure out how to toggle selectable layers in ArcMap 10. In 9.3, I remember being able to choose from a list which layers I wanted to be able to select ...
6
votes
1answer
517 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 = ...
6
votes
1answer
2k 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 ...
5
votes
5answers
191 views
How to divide a feature class into ranges?
I have a shapefile consisting of around 4000 polygons. The polygons are created from buffering around a similar number of islands somewhere in the Norwegian archipelago. Due to an error in the ...
5
votes
1answer
683 views
Select all “NULL” values in the attribute table?
I have a quite simple syntax question.
I want to select ALL my null values in an attribute table of a feature class, not just the values in a single field.
So the question would be: what is the ...
4
votes
1answer
557 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 ...
3
votes
2answers
48 views
Select by Attributes (features sharing a common attribute value)
I am attempting to 'select by attributes' a point feature with the lowest numeric value which shares a common value with other point features in another field. For example: I may have 3 point features ...
3
votes
2answers
246 views
Listing features in the order they were selected
This is an ArcObjects-specific version of this question: Create Array From Selected Features Based on the Order in Which They Were Selected
Is there a way to get the selected FIDs of a feature layer, ...
3
votes
1answer
517 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 ...
3
votes
2answers
85 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
4answers
2k 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 ...
3
votes
2answers
377 views
Can't Select and Export from Python Script
I am a novice in python programming but I am trying to learn by doing.
I got stuck with this function a while back and can't seem to find a solution or a workaround.
I am writing a script that is ...
3
votes
2answers
358 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 ...
3
votes
2answers
659 views
Missing tools (icons) QGIS
I lost selection and navigation tools from the GGIS 1.8 toolbar when I tried drag then to different place. I can't get them back anymore. Where they disappear? All these tools are checked but are ...
3
votes
0answers
43 views
Select by location not working properly after using Multipart to Singlepart
I'm having issues using Arcgis 9.3 and the multipart to singlepart feature and then selecting by location.
Basically I'm able to run the multipart to single part feature to split up some of my ...
3
votes
2answers
312 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 ...
2
votes
1answer
47 views
Exporting Selection Using Python
I currently have a search cursor iterating through a shapefile in ArcGIS 10.1 that selects a feature and runs a viewshed analysis on that feature (and only that feature).
What's the easiest way to ...
2
votes
2answers
81 views
Using select by location to update a field in a feature class
I am using Arc 10.1 and I am working on a script that takes a value from a field within one shape file and updates a field in another shape file based on its location. Basically I have smaller parcels ...
2
votes
2answers
351 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. ...
2
votes
2answers
97 views
How can a style be set on a specific polygon using OpenLayers?
Using a polygon id, I want to highlight a polygon, while the mouse is outside of the map area. I can identify the polygon using the following approach:
x = 53;
for(i=0; ...
2
votes
2answers
281 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
3answers
339 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 ...
2
votes
1answer
115 views
Select top 5 most items in a geodatabase
I'd like to know what is the best way to select the 5 most expensive items (in terms of actual monetary value) in my geodatabase where i have a price field. Prices are not necessarily ordered but can ...
2
votes
2answers
427 views
zoom to cluster onClick & have hover event
I've made a simple mock-up trying to combine two openlayers examples. I want to have clusters on which I can hover (so I can display an infowindow about it's content) and I want users to be able to ...
2
votes
4answers
745 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 ...
2
votes
1answer
431 views
ArcGIS Javascript: upgrade ComboBox to FIlteringSelect using ItemFileReadStore
I would like to upgrade a web app I am working on from v2.1 to v3.1 of the Javascript API (I have tried 3.2 but I am getting some very odd rending problems, so I'm settling with 3.1 for now...)
One ...
2
votes
2answers
625 views
How to select multiple polygons or points from WFS or WMS and getFeatureInfo
Is there a way to select multiple polygons and/or points from a WFS or WMS service and then get the feature information for each selected item? There are numerous examples on the OpenLayers website ...
2
votes
2answers
149 views
How to modifiy how selection highlights are displayed?
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 ...
2
votes
1answer
270 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 ...
2
votes
1answer
91 views
How can I select features by map clicks
I'm developing a flex web application using the ArcGIS flex API 3.1.
I have a map with a polyline feature layer. I'd like to be able to select polylines from the map by clicking on the features on ...
2
votes
0answers
56 views
How do I select all polygons in a layer that border 2+ polygons in the same layer?
My data consists of equal-sized polygons. I need to identify and select all the polygons that border two or more polygons.
2
votes
1answer
129 views
How can I select enclosed features within the same layer?
My problem: I have a single shapefile from a habitat-survey and need to select all hedge-features that are enclosed in meadows.The features that are to be selected were created by filling rings.
...
2
votes
0answers
67 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 ...
2
votes
2answers
742 views
How to split single shapefile into many, and use them as geoprocessing extents in ModelBuilder
I am trying to do the following things using ArcGIS model builder.
select by expression to output feature class.
use output feature class as spatial extent
raster to point
The main goal is to ...
2
votes
2answers
222 views
onSelect sometimes firing before onUnselect
I have a map that displays satellite coverage zones. Some of these coverages overlap. I am using the SelectFeature functionality to fire off onSelect and onUnselect events.
However, when moving ...
2
votes
0answers
165 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 ...
1
vote
1answer
57 views
Why does this SQL syntax produce empty feature class with ArcGIS Select_analysis?
I'm working on a script that involves an arcpy.select_analysis function. The problem I have is that when I run the script it produces an empty file. I've verified that the whole thing works when in ...
1
vote
3answers
813 views
How can I unselect a feature in Openlayers?
I am able to identify the selected features on my map using the following line:
vector_layer.selectedFeatures
I would like to be able to deselect this feature using a standalone function (not an ...
1
vote
2answers
48 views
How to select two points on a map using QGIS?
I need to select two points on a map in QGIS. I selected the element selection tool in menu view and I want to select two points. How can I accomplish this? Are there other tools or methods to ...
1
vote
1answer
98 views
Sorting points with QGIS
I have a very good idea of what I would like to do but I really do not know if it is possible with QGIS.
I have points that each one corresponds to a group size and I would like to use GIS to sort ...
1
vote
1answer
32 views
How to select points within a polygon from another layer?
I'm using QGIS 1.8 with a PostGIS database and I have three postgis-layer in qgis a lines layer, a points layer and a polygon layer.
What I'm trying to do is to select a polygon in the polygon layer ...
1
vote
2answers
531 views
Exporting selected feature to google earth in QGIS?
Does anyone know if there is a plugin for QGIS that will export features to google earth similar to the one for MapInfo?
Thanks,
Alan
1
vote
2answers
24 views
Selecting an item with the mouse in MapBasic
This may seem relatively simple, but I'm pretty confused. I have written a mapbasic tool that does things to the table 'Selection' depending on user choices in a popup menu, but currently you need to ...
1
vote
1answer
153 views
How to select features from different WFS layers?
I'm trying to select features from different WFS layers but unfortunatelly it doesn't works in my code.
This is my code:
var select = new OpenLayers.Layer.Vector("Selection", {styleMap: new ...
1
vote
1answer
149 views
Data Driven Pages, Graphs, and selections in ArcMap 10.1
Is it possible in python to create a selection set based on the extent from a Data Driven Page (DDP)? I have a layout view with a map and a graph. The graph is set to only plot the selected set of ...
1
vote
2answers
214 views
How to select features in ArcGIS based on their relation to other features within same layer?
I want to select all the features in my Waterlines layer that share a line segment with other features in the same layer. I've done a complicated search cursor iteration in python that takes a couple ...
1
vote
1answer
121 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 ...
