[postgis-users] PostGIS Usage Survey

[Ken Horton]

>
> - Name of the organization 

ImageLinks, Inc. (www.imagelinks.com)

>
> - Data being managed in the database 

On line Active Archive of Imagery (Satellite, Arial), Maps (DRGs), and 
Elevation (DTED,DEM)

>
> - How the data is being accessed / manipulated 

Data is staged using C++/libpq++. Each record contains image meta data 
 (datum, type, bands, acquistion date,etc).
Image vertices are used to create a POLYGON geometry.
End users queries for data are based on an Area of Interest (AOI). AOI 
is established  via  web interface
using a map interface (OpenMap), Lat-Lon, or UTM.
Available data within the AOI is determined using PostGIS queries from PHP.
Experimentation is currently in progress using shape files.

>
> - Why you chose to use PostGIS for the application 

Open Source, OpenGIS functionality.
PostGIS geometry overlap functions are  expecially useful for imagery 
and AOIs
that are not rectangular (i.e. Landsat footprint, hyperspectral scenes).