#2651: Increase maximum number of vector points available
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Reporter: dnewcomb | Owner: grass-dev@…
Type: enhancement | Status: new
Priority: normal | Milestone: 7.1.0
Component: Vector | Version: unspecified
Keywords: vector point data | Platform: Unspecified
Cpu: Unspecified |
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The current number of points in a imported into a vector data layer
appears to be limited to a 32 bit integer ( 2 billion) . You are allowed
to import more, but the number of points are indicated with a negative
number Not sure if the data set is still valid at that point.
The primary use case for this is lidar data. The new USGS standard for
landscape LiDAR data collection is QL2 , http://pubs.usgs.gov/tm/11b4/ ,
roughly 2 points/meter density. The lidar ground points at this density
can exceed the 32 bit integer limit in a 1000 km^2 area (31km x 31km). I
already have counties in NC, USA with ground point data that exceed this
threshold.
Newer LiDAR technologies ( Single Photon, Geiger Mode) with collection
densities of 20 points/meter are already available, but r.in.lidar may be
more suitable for these data sets in the short term.
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Ticket URL: <http://trac.osgeo.org/grass/ticket/2651>
GRASS GIS <http://grass.osgeo.org>
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