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FlightGear Newsletter January 2012: Difference between revisions
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FlightGear Newsletter January 2012 (view source)
Revision as of 21:24, 15 January 2012
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== Scenery corner == | == Scenery corner == | ||
=== Topologically clean datasets === | |||
Martin now has what should be topologically clean CLC2000v15 and VMap0 edition 5.0 datasets. He'll load these into the [http://mapserver.flightgear.org/ Landcover-DB] as replacements for the current VMap0 and CLC layers. | |||
Thanks to the great folks at GRASS GIS, most notably Markus M., the procedure of cleaning large vector datasets like [[CORINE]] is now a matter | |||
of just a few days and runs on a machine with far less than 32 GByte of main menory! One year ago, cleaning CORINE took about one and a half | |||
months to complete just one single (!) of multiple iterations and you never knew if somebody would reboot the server while the job was still running (which actually happened several times). | |||
Having topologically clean datasets is a very important step for at least two reasons: | |||
# TerraGear's overall stability is expected to increase with topologically clean vector data. | |||
# Merging custom land cover data (like John Holden's great work) into the "Custom Scenery" layer (at MapServer) had been failing in some cases due to topological inconsistencies. These failures are expected to disappear with topologically clean vector data. | |||
# As soon as the various tools are working in a predictable manner, the driving motivation behind all the effort can be revived, which is to build an infrastructure for re-compiling the respective terrain tiles on a regular, maybe daily schedule after the land cover has been updated in a certain region. | |||
A clean CLC2006 will be provided as well, but because that one's still incomplete (and work in progress, actually) CLC2000 is considered more important. | |||
=== TerraGear GUI updates === | === TerraGear GUI updates === | ||
After a couple of months of little (to none) development, Gijs released a new Windows binary of the [[TerraGear GUI]]. Other OS are supported, but require it to be build from source. | After a couple of months of little (to none) development, Gijs released a new Windows binary of the [[TerraGear GUI]]. Other OS are supported, but require it to be build from source. | ||