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OpenSource GIS

Show Us Map! 45 Minutes to Build Your Own 3D City Map Server with SUAS MapServer 3

The tranditional 2D Web GIS can not satisfy the people, who are toughing new technique everyday. The 2D map has many better features such as rapid speed, non-client and easy to be implemented, but with the fast renovation of hardware and internet, those features have lost their adventage to 3D map. MSN, Google Map have supported 3D online map and many GIS companies have also released many powerful desktop softwares to help the users to update their 2D data or build 3D model based on forehaved 2D data.

Such as ArcView 3D Analyst:

Show Us Map! 30 Minutes to Build Your Own Map Server with SUAS MapServer 3

Have you used Google Map? Are you potty about its amazing and powerful functions? Would you like to have one such map server, even you are not a Giser or just know a little bit of GIS technique.

If you are working in GIS field, and you want to build your map server to deliver your map data, but UMN Map Server is too difficult to install and config, and too complex to use and make you headache. Of course, the UMN Map Server is a nice and strong tools, but you don't wanna wasting time to learn a lot of tutorials before the installation.

Use different Symbol style in one layer (Geoserver)

I have one layer in Geoserver, the data query is one table with geometry, there is one column named 'TYPE', which has 3 different type: 'rest', 'park', 'hotel'.
I need set 3 different color for this layer depends on 'TYPE', so custom SLD style should be defined in Geoserver like this:

  1. <?xml version="1.0" encoding="ISO-8859-1" ?>

Display Vector layer from GeoServer WFS on OSM with GeoExt&OpenLayers

Supposed that you know what is GeoExt, GeoServer and Openlayers.

Preparation:
GeoServer with geo data under SRS 'EPSG:31467'

Purpose:
Display vector layer from WFS of GeoServer on OSM(Open Street Map).

Problem:
Can not display vector layer on OSM map, but no problem for displaying vector layer on a normal WMS map.

Codes(only key part) for displaying vector layer on WMS map:

============For WMS=====================

vectorLayer = new OpenLayers.Layer.Vector(
"vector"    );

EPSG:4326(WGS84) WMS in Openlayers and EPSG:900913 Google Map

In SUAS Map Server I used Openlayers to display WMS layers in EPSG:4326 SRS with Google Map, I found the WMS overlays are always be transformed, now i kown the reason. EPSG:4326 != EPSG:900913

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