To show, hide, extract, or remove particular data from a larger set, narrowing it down, or the specific criteria used to do so.

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2
votes
3answers
4k views

OpenLayers WFS protocol: work with filters if the protocol is defined out of layer constructor

follow question:wfs-load-feature-check the scenario is: i am trying to load a WFS layer, since it takes a while to load all features, I want to give user a notice while waiting for response. the ...
2
votes
2answers
184 views

Query/find features in ArcPad, hide the rest in map?

Trying to help out another department that does quarterly assessments of field data. Their symbology is all set by the status of the assessment (the only way I could figure out how to hide something ...
1
vote
2answers
464 views

How to use the SLD Filter “Difference”

I have a postgis table with polygon geometries. I would like to create an sld which first does an inside buffer, and then a difference between the buffer and the original geometry. This is basically ...
4
votes
2answers
997 views

What is the best approach to using IQueryFilter.WhereClause in ArcObjects?

What is your preferred / best approach to using IQueryFilter.WhereClause statements in ArcObjects (e.g. when selecting features by attributes)? You need to check the source type (shapefile / personal ...
6
votes
1answer
1k views

How to filter wrong GPS readings?

I have absolutely no experience with GIS, it just so happens that one of the hobby projects I am doing at the local hackerspace includes tracking a model boat with a GPS... I hope this is the right ...
3
votes
2answers
3k views

OpenLayers: Combine multiple OGC filters

I have two OGC filters client side: <ogc:Filter xmlns:ogc="http://www.opengis.net/ogc"> <ogc:PropertyIsEqualTo matchCase="true"> ...
4
votes
3answers
3k views

How to properly utilize DWITHIN Spatial Filter in OpenLayers

Given the following code: var points = []; points.push(new OpenLayers.Geometry.Point(-110, 38)); points.push(new OpenLayers.Geometry.Point(-108, 40)); var lineString = ...
3
votes
1answer
841 views

Case Insensitive WFS Attribute Search with ArcGIS Server?

I'm using ArcGIS 9.3.1 to host WMS and WFS services. I have a map (.mxd file) with a layer whose attribute table includes fields with mixed-case string data. When I open this map in ArcMap and ...
2
votes
1answer
680 views

How to query some properties of a list of typenames in geoserver

I want to query selected propertynames from a list of Typenames in Geoserver. I could find an example from OGC WMS 1.1.0 Implementation Specification ( pdf document page 80 Example 10) which is not ...
2
votes
1answer
558 views

Is there any way to perform spatial filter on multiple layers together?

I have a scenario where a featureclass[Child Version] is queried for some overlapping features on [SDE.DEFAULT] Version using ISpatialFilter, After getting few result, these features are looped and ...
11
votes
2answers
3k views

How to filter big datasets in Geoserver WMS?

Is there a good way to filter datasets with approx 50,000 features in Geoserver? I'd have to select between 100 and 200 features based on ids. These ids are different from the FeatureIds. Couldn't ...
8
votes
1answer
790 views

How to apply a Majority filter in GRASS GIS?

I was wondering if someone could help me write a majority filter for GRASS GIS. I have this map (see below) which I need to run a filter over to make the red areas a bit more dominant. I know I can ...