A representation of a real-world objects on a map.
14
votes
5answers
4k views
What's the difference between feature class and feature layer?
This may be very trivial question. To me they seems very similar in concept. What's the difference between feature class and feature layer?
4
votes
1answer
284 views
Need to delete all but one feature from a set of features with the same ID, keeping the one with the largest area
I have a large polygon layer in which most of the polygons have a unique name in a text field. Of the hundreds that aren't unique, there will be 2-4 polygons with the same name but different ...
11
votes
2answers
3k views
How to use label classes, expressions, and annotations?
I've always found that when it comes to python, vector analysis, QGIS gives ArcGIS a run for its money, hell some of the qgis plugins exceed ArcGIS's performance by a few hours; however, I always have ...
10
votes
3answers
340 views
What are some of the features available in non-FOSS GIS software that you'd like to see in your favorite FOSS GIS
For example, a program I use (TransCAD) has the ability to do travel time matrices based on minimal data input, which is really useful if you're looking at doing back of the envelope type ...
1
vote
1answer
151 views
QGIS identify features button issue
Is there anyway to get the Identify Features button in QGIS to automatically select a layer and provide the information without having to highlight it first in the layers TOC? MapInfo and ArcGIS ...
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 ...
5
votes
3answers
248 views
Selecting polygons by number of sides
I'm using ArcGIS 10 to build some figures for a journal article. One is a figure of an unstructured finite element mesh of triangles spanning the western Atlantic Ocean. I exported this mesh from ...
3
votes
2answers
518 views
Replicating ArcMap's Point Sketch Geometry Editing (Feature Templates) in ArcObjects
I'm looking for a way to place, select, move, delete features inside a custom C# ArcObjects application (using AxMapControl). I found the exact behavior in ArcMap, but I want to save the user some ...
4
votes
3answers
289 views
Can I prevent features from being created outside an OpenLayers map?
In our app, we allow users to create features on maps. The boundaries of these features will later be converted into real-life latitude/longitude coordinates, but does not make sense if features are ...
4
votes
1answer
4k views
How to get features in Openlayers vector layer
What is the exact API to get all features in a vector layer in OpenLayers? Suppose I have the "map" object, within which is a "Vector Layer": how can I obtain features in the layer?
3
votes
2answers
1k views
How to create a feature class in a file geodatabase in ArcGIS 9.3 with Python?
I'm not entirely sure if I am using the correct terminology, so I apologize in advance. What I am looking to do is create a file geodatabase and add a feature class directly into that file ...
2
votes
3answers
130 views
how to change color of feature to mark it as recently modified with openlayers
I am developing a crowd sourced app using openlayers. after user clicks an feature, a popup form is displayed. After clicking the save button, the data is used in processing which takes some time so ...
1
vote
1answer
320 views
Overlaping graphics not visible in featureLayer
I have constructed featureCollection from Json and feature collection has 44 features. I have given this feature collection as input to the Featurelayer which is showing only 32 graphics objects of ...
1
vote
4answers
3k views
Cutting features in ArcGIS 10
What´s the easiest/smartest way of getting the opposite output of the clipping tool? I just need the area of feature A1 which is not covered by feature A2 in a new Layer/File.
Now, I get the result by ...
