[GRASS-user] Question about least cost path

2010-02-21 Thread johannnes83
Dear All, I am using least cost path to model migration of wildlife through the landscape. In my understanding from what I have read on this list and in the grass manual I do the following steps: 1.) r.walk or r.cost for the cost distance. 2.) r.drain where the starting point is the end point

Re: [GRASS-user] stable java library for grass

2010-02-21 Thread Sören Gebbert
Hello, i am not sure, but maybe this will help you a bit? There is the vtkGRASSBrige: http://code.google.com/p/vtk-grass-bridge/ vtkGRASSBridge provides a VTK/C++ interface to most of the grass gis raster and vector C library functions. Its using an intuitive class structure to hide the

Re: [GRASS-user] Rectify an image

2010-02-21 Thread Maciej Sieczka
Nikos Dumakis pisze: Greetings I have an image without any GCP's but, teorethically it's in WGS84. I have all pixel positions outside that file. My question is, what should I do in GRASS to rectify/project this image? I thought in two solutions If the image doesn't require warping, but is just

[GRASS-user] Re: Bug or my fault?

2010-02-21 Thread georgew
The only culprit I could find so far is the number of vector or dbf files in the Location. If the number is greater than 188 then the wxPython GUI goes into an infinite loop. Reduce it to 188 and it works as it should. It does not matter which ones are the 188 files, as long as there are no more

[GRASS-user] Re: grass-user: make error......

2010-02-21 Thread bharath s
make error : i have installed all libraries from source and after that i configured grass without any error while make i got some modules missing make error(1). ld 1 exists... please help me... ___ grass-user mailing list grass-user@lists.osgeo.org

Re: [GRASS-user] Re: calculating maximum and minimum diameters with, GRASS or R and GRASS?

2010-02-21 Thread Hamish
Gary Nobles wrote: I have 900 polygons I wan to calculate a max and min diameter for each individual polygon so poly1 max diamter=n min diamter=n I have already got a diameter and area from the db. modules, however I can only get an idealised diamter using pie r ^2 so not what I want

Re: [GRASS-user] Re: calculating maximum and minimum diameters with, GRASS or R and GRASS?

2010-02-21 Thread Hamish
Hamish: so what you want to do is fit an ellipsoid to the polygon, and then examine the radii of the major and minor axes. ... maybe I'm making it more complicated than it has to be, yeah I am, that should read ellipse (2D) not ellipsoid (3D). Hamish

Re: [GRASS-user] Re: grass-user: make error......

2010-02-21 Thread Hamish
make error : i have installed all libraries from source and after that i configured grass without any error while make i got some modules missing make error(1). ld 1 exists... please help me... without seeing the exact error message, it is impossible for us to guess what it says, or