A bunch of OGP developers are getting together on Wednesday, January 11th at 4pm Eastern Time. If you want to join us, email Steve McDonald (Stephen.McDonald@tufts.edu). Here’s our agenda:
- Status Update – what people are doing
- Berkeley’s Project
- Solr Schema Changes
- Questions – Protected content programming
Here’s the details on Berkeley’s project:
Here at Berkeley, we have about 40,000 scanned maps, mostly from topographic map sets. These maps have to be georeferenced, which is a long process, but we can assign bounding boxes to each file/sheet. We would like to make these maps available to our patrons for searching and visualizing while we are working on georeferencing them. We have managed to get non-georeferenced images into Geoserver, so we can use the same server and access method for the non-georeferenced images as for the georeferenced ones.
PROPOSAL
We propose that we add a new key value pair to the Solr record. The key would be ‘georeferenced’ and the values would be true or false.
The Solr record would have a bounding box, but the bounding box would be approximate.
A layer whose Solr record ‘georeferenced’ field has a value of false would behave in every way like a regular layer except that
on preview, the layer would open in a new openlayer window.
Since the URL for accessing a non-georeferenced layer is different from a regular WMS call, there will also be some code that will deal with that, but it can easily work off the ‘georeferenced’ metadata tag. (here is an example
<a href=”http://linuxdev.lib.berkeley.edu:8080/geoserver/UCB/wms?service=WMS&version=1.1.0&request=GetMap&layers=UCB:images&CQL_FILTER=PATH=’furtwangler/17076013_02_015a.tif’&styles=&bbox=0.0,-65536.0,65536.0,0.0&width=512&height=512&srs=EPSG:404000&format=application/openlayers“>17076013_02_015a.tif</a>
notice the CQL_FILTER argument. This is a working URL, though the Geoserver is on a development system and may go down without notice.)
DEVELOPMENT
Since we have a pressing need for this modification, we would of course do the development and make the code available as an OGP module.