A characteristic of an object (person, thing, etc.). In the GIS field, it is used to refer to the non-spatial data associated with a location or geometry

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10
votes
5answers
2k views

How to identify duplicate attributes in a field?

I have a point shapefile with thousand of points. It has an ID code field that supposed to be unique. Every now and then the data entry clerk wrongly type the id creating duplicates.Right now I'm ...
3
votes
1answer
691 views

Changing attribute data types using PyQGIS

OK, so I've already asked a question how to access attribute data types when developing plugin for QGIS, using PyQGIS. And one helpful member said i should use pendingFields() method on the current ...
6
votes
2answers
136 views

What event is fired when a feature is edited?

When the user draws a new feature (line, point, etc.) in ArcMap, there are null attributes. If the user enters values in these null fields what is the event that is fired? I want to control the ...
2
votes
2answers
2k views

How to access attribute data type in QGIS?

I've been developing a plugin on QGIS platform using PyQGIS. So far plugin does the following: You can select any feature of the already loaded vector layer in QGIS. After selection, plugin displays ...
0
votes
1answer
408 views

ArcGIS Server REST-Query Layer: only few attribute fileds are returned in response

a newbie question in using ArcGIS Server REST service: from ArcGIS Services Directory, I opened the page of one layer in a MapServer service, this layer has a long list of attributes/fields. however, ...
10
votes
2answers
1k views

How to compute a new attribute based on changes in another attribute?

I am attempting to classify a set of gps time-encoded point data into behaviors based on different attributes. I have created an attribute that is 0 for home and 1 for away based on location, and now ...
2
votes
2answers
462 views

ArcSDE: Specifying fields to not allow null values

I have a feature class in SDE that has various fields where the setting AllowNulls is set to FALSE. When creating a feature in ArcMap in this feature class it still allows nulls to be specified in ...
5
votes
1answer
1k views

Can I change properties of several layers simultaneously?

I'm working on bulk data. I have a few hundred GeoTIFF images imported into a QGIS project, and I'd like to modify their layer properties - things like the no-data-value, transparency of certain pixel ...
1
vote
1answer
554 views

Join attribute table

I am using QGIS 1.7.3 on Mac and when I try to use the tool "join" in the properties toolbox, I have no possibility to add a name for either the file or the field used to join tables. Has anyone ...
1
vote
1answer
1k views

To get FeatureInfo in OpenLayers

I am new to OpenLayers and I want to add OpenLayers.Control.WMSGetFeatureInfo to get feature info to website.But i can't figure out right method. I also see the source code of GeoServer OpenLayers ...
5
votes
3answers
2k views

FME: Join attributes in text file with attributes in SHAPE file

I have a SHAPE file with points and different attributes - one attribute MyID. I also have a plain text file with several attributes - each in a separated column: MyID MyValue 1 A 2 B 3 C ...
1
vote
0answers
98 views

How to maintain schema when copying feature from layer 1 to layer 2, where both layers have same schema?

If I load two unique layers, wherein each layer contains unique data, but both layers share the exact same schema, why is it when I copy a feature from layer 1, and paste it into layer 2, the ...
2
votes
1answer
2k views

FME: No attributes exported when writing to SHAPE file

Setup: I have some input data (SHAPE) which I use a Clipper transformer on. Depending on the result of the Clipper, I assign a value to an attribute. In the end I assign the two results/streams to a ...