Re: [gdal-dev] weeding out x,y,z points

2009-02-26 Thread Wesley Roberts
Have you looked at the spatial applications available in R. It sounds like you have a lidar data set yes? R has a bunch of packages that could help, gstat, spatstat, maptools, sp, etc have a look at http://wiki.r-project.org/rwiki/doku.php?id=tips:spatial-data One option I can think of, but

Re: [gdal-dev] weeding out x,y,z points

2009-02-26 Thread Jose Gomez-Dans
Hi, 2009/2/26 Ari Jolma ari.jo...@tkk.fi nicholas.g.lawre...@mainroads.qld.gov.au wrote: nicholas.g.lawre...@mainroads.qld.gov.au Can GDAL or OGR weed out 3D points based on proximity to each other? I would use plain Perl (or Python or high level language X) to read in the points

Re: [gdal-dev] weeding out x,y,z points

2009-02-26 Thread Joaquim Luis
Okay, I downloaded the Manpages. My initial reading is that blockmean and blockmedian work by averaging the values. blockmedian does not do point average. It does take the median point inside each bin. However, if the number of points inside a bin is even than it takes the average of the

[gdal-dev] weeding out x,y,z points

2009-02-25 Thread nicholas . g . lawrence
A client has a very large (millions of records) ascii file consisting solely of x,y,z co-ordinates. They would like to reduce the number of records by weeking out points that are too close to each other. Can GDAL or OGR weed out 3D points based on proximity to each other? Regards, nick

Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread Mateusz Loskot
nicholas.g.lawre...@mainroads.qld.gov.au wrote: A client has a very large (millions of records) ascii file consisting solely of x,y,z co-ordinates. They would like to reduce the number of records by weeking out points that are too close to each other. Can GDAL or OGR weed out 3D points

Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread Joaquim Luis
nicholas.g.lawre...@mainroads.qld.gov.au wrote: A client has a very large (millions of records) ascii file consisting solely of x,y,z co-ordinates. They would like to reduce the number of records by weeking out points that are too close to each other. Can GDAL or OGR weed out 3D points based

Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread nicholas . g . lawrence
nicholas.g.lawre...@mainroads.qld.gov.au wrote: A client has a very large (millions of records) ascii file consisting solely of x,y,z co-ordinates. They would like to reduce the number of records by weeking out points that are too close to each other. Can GDAL or OGR weed out 3D

Re: [gdal-dev] weeding out x,y,z points

2009-02-25 Thread Ari Jolma
nicholas.g.lawre...@mainroads.qld.gov.au wrote: nicholas.g.lawre...@mainroads.qld.gov.au wrote: A client has a very large (millions of records) ascii file consisting solely of x,y,z co-ordinates. They would like to reduce the number of records by weeking out points that are too