[postgis-users] How do you use PostGIS Raster?

[Pierre Racine]

What are you missing to implement any of those in PostGIS raster?

From: postgis-users-bounces at postgis.refractions.net [mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Bryce L Nordgren
Sent: Tuesday, June 07, 2011 3:12 PM
To: PostGIS Users Discussion
Subject: Re: [postgis-users] How do you use PostGIS Raster?


I'm not using PostGIS raster yet. We've been using PostGIS for years to keep track of active fire and burn scar detections from the MODIS instruments on board the Aqua and Terra satellites. Part of our process is to resample the point detections onto a grid which aggregates burned area over the course of a fire season. Aggregating onto a grid has been performed using an external program, but we'd like to be able to use PostGIS raster.

More recently, we're comparing a vector fire perimeter from the MODIS instrument  to a higher resolution Landsat image of the area. We select the areas of the Landsat raster which are inside the perimeter vs. outside the perimeter and calculate histograms on the separate image regions. Currently, we're using ENVI and IDL to do this more or less manually. We'd like to be able to perform this inside PostGIS, as PostGIS is the source of the vector data anyway.

Bryce
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