[GIS] Building Floor Plan map using OpenLayers and json

ext-jsgeoextgeojsonhtml5openlayers-2

How to show map of building floor plan using OpenLayers and json.
moreover, i want to know that how to change features dynamically with zoom based from json files. Let's take example,

Initial the polygon of building feature shows then,
second zoom, detailing map with more features like sitting arragement with desk and chairs, then
third zoom, more detailing with attributes of each sitting arragement.

Above mention zoom level have different type of symbology of each.

How to make this, pl. help me on this..

Regards
GIS User

Best Answer

For the OpenLayers.Format.GeoJSON feature collection use an OpenLayers.Layer.Vector instance. Examples from the OpenLayers Examples Gallery:

Use a zoom based strategy for displaying your layers. This can be achieved using the minScale and maxScale properties in the options object passed to an OpenLayers.Layer.Vector instance.

http://dev.openlayers.org/docs/files/OpenLayers/Layer-js.html#OpenLayers.Layer.minScale

Related Solutions

[GIS] Beginner needs suggestions on map clicks and geojson

You should parse response inside success function:

OpenLayers.Request.GET({
  async: false,
  url: "./04-sql-to-json.jsp",
  params: {sql: sql},
  success: function(e){
    features = geojson.read(e.responseText, "FeatureCollection");
  }
});
id = features[0].attributes.id;

[GIS] Caching / Preloading data for use with WMS queries

Given that you are requesting WMS tiles, you can use a cache service like WMS-C (WMS Cached), Tile Map Service (TMS) or Web Map Tile Service (WMTS); the latter is an OGC standard. There are several implementations of these standards; to mention some, there are GeoWebCache, TileCache or MapProxy.

Because you are using GeoServer, I think that the best solution in your case would be GeoWebCache, that has a very good integration with GeoServer. Among the standards mentioned before, perhaps WMTS is the one that suits your needs the most, because WMTS can cache the results of GetFeatureInfo requests. Currently GeoWebCache 'fully implements WMTS using KVP'.

Best Answer

Related Solutions

[GIS] Beginner needs suggestions on map clicks and geojson

[GIS] Caching / Preloading data for use with WMS queries

Related Question