rasdaman Quickstart

rasdaman is a raster server allowing queries on n-D raster data stored in a standard relational database.

This Quick Start describes how to try out queries on a sandbox of raster objects. Before trying these examples, the rasdaman server has to be started (Geospatial ‣ Databases ‣ Rasdaman ‣ Start Rasdaman Server).

Exploring the 1-D to 4-D examples

• You can access the local rasdaman demonstrator to explore various demo data sets. The small ones are part of OSGeo-Live, those utilizing larger sets forward directly to the Earthlook site (requires active network connection).

Running queries locally

• Open a console and open the sample database installed locally

• use the rasql utility to send queries and receive results, for example:

  $ rasql -q "select png((char)(c.red / (c.red + c.green) - c.green / (c.red + c.green)) > 0.6 * 255) from rgb AS c" --out file

• use your favorite image inspection tool to open the file generated.

Create your own database

• Open a console

• Download and install rasdaman and its prerequisites

• run the demo ingestion script:

  $ install_demo.sh

• use the rasql utility to send queries and receive results, for example:

  $ rasql -q "select png( NIR ) from NIR" --out file

Things to Try:

Here are some additional challenges for you to try:

• Explore the demo data sets by browsing the rasql query language guide
• To learn more about the OGC Web Coverage Processing Service (WCPS) Language standard (which was heavily inspired by rasdaman), a starting point is the documentation and tutorials page .