Opened 8 years ago

Closed 3 years ago

#5762 closed enhancement (wontfix)

Add indexing to VRT raster implementation

Reported by: hrz Owned by: warmerdam
Priority: normal Milestone: closed_because_of_github_migration
Component: GDAL_Raster Version: svn-trunk
Severity: normal Keywords:


As described in the conversation at there is no indexing in the VRT implementation. For VRT data sources with a large number of source datasets (over 700,000 in the example) this lack of indexing can lead to performance problems since each RasterIO() request will have to go test if each source interstects the requested area of interest.

Possible solutions mentioned in the mailing list include adding an in-memory spatial index after opening the VRT.

Another solution mentioned included referencing a shapefile tile index as a VRT datasource and delegating indexing to that format. From my point of view having a shapefile tile index as a first class raster datasource would be very useful.

It is possible the OGR VRT implementation could benefit from similar enhancement.

Change History (1)

comment:1 by Even Rouault, 3 years ago

Milestone: closed_because_of_github_migration
Resolution: wontfix
Status: newclosed

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