[GIS] How to perform spatial query using openlayers and geoserver

geoserveropenlayers-2

I have on my geoserver 2 shp files : pipes and buildings.
I would like to put a form on my openlayers page that when user click it , he can choose distance (10m , 20m, etc…) and get a result of => all pipes in distance X from buildings.

How can I do that using geoserver (I don't wish to upload my shp files to any database because they are being updated regularly)?

Best Answer

I would recommend you to read something about CQL. Good starting point might be here and there. You should be probably the most interested in DWITHIN geometric predicate.

PS: And there.

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[GIS] Automating Geoserver & OpenLayers setup

I had almost the same issues as you last year, when I worked on an open-source (PostgreSQL&PostGIS database + Geoserver + Javascript frontend) WebGIS architecture.

I developed on Ubuntu and solved the automation issues using a mixture of CRONed bash scripts, which:

periodically performed SQL queries to insert/modify features into the DB. Data was stored under a filesystem folder into CSV text files, which were read by the scripts and pumped into the DB.
added new raster data, whenever available, calling Geoserver REST APIs

Javascript code had not to be modified because it automatically loaded all of the Geoserver layers.

Hope this kind of approach can help you...

[GIS] Finding URL of GeoServer layer

The short answer is

http://localhost:8080/geoserver/cite/wms

The longer answer is that the URL in OpenLayers is the base URL of the web map server (so all the bit before the ? in the full URL). OpenLayers then adds the required parameters to make up the URL that is required to get a map. Some of those parameters are added from your layer definition (i.e. layers, transparent etc) and others from the map object (i.e. width/height and bounding box). See Lesson 8 of my old course to see a fuller discussion.

Best Answer

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[GIS] Automating Geoserver & OpenLayers setup

[GIS] Finding URL of GeoServer layer

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