<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>
<DIV>Hi,</DIV>
<DIV> </DIV>
<DIV>I am developing a web based GIS application. Following tools are used in the development:</DIV>
<DIV> </DIV>
<DIV>(1) PostGIS database that contain the exported shape file data (i.e Geometry and attribute data) in table form</DIV>
<DIV>(2) GeoServer to publish maps and layers as WMS and WFS services</DIV>
<DIV>(3) OpenLayers for mapping</DIV>
<DIV>(4) Java (JSP) for Server side scripting.</DIV>
<DIV> </DIV>
<DIV>
<DIV>I want to perform online spatial analysis and show it on the map.</DIV>
<DIV> </DIV>
<DIV>(1) Suppose I enter a buffer zone in a textbox, now I want to see how many parks are inside that buffer zone near my house. The parks inside the buffer zone should be highlighted.</DIV>
<DIV> </DIV>
<DIV>(2) As there can be different types of parks, like national park, muncipal park, etc. How to highlight that area having only national parks.</DIV>
<DIV> </DIV>
<DIV>The data of parks and houses are stored in the postgresql/postgis database as point features.</DIV>
<DIV> </DIV>
<DIV>How to implement it using OpenLayers, GeoServer, PostGIS and if required Server side technology like PHP or Java can also be used.<BR></DIV>
<DIV>It will be apprecited if some examples are posted or links are provided related to the stated problem.</DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
<DIV>--</DIV>
<DIV>Matt</DIV>
<DIV> </DIV></DIV></DIV></div><br>
</body></html>