Dear friends,
I am a kind of advanced newbie, if that makes sense.
I have a text file of the form
coordinate x,coordinate y,cat={real number between 250 and 450}
where coordinate are expressed in latitude and longitude. The files represents
measurements of the size of a skulls on sites all over Africa.
From it, I would like to build a raster file, 100 km by 100km. There are 2
problems:
1) Unfortunately, in some 100km x 100km squares, there is one of the points
whilst in others there are maybe 20. How do I average, so that in each square
I only have 1 value representing the average?
2) How do we "flatten" Africa so that we may use 100km x 100km squares instead
of 1 degree x 1 degree, without committing a geographical crime? What we need
is to respect the areas ....
Best regards and apologies for the silliness of the questions.
--
Corrado Topi
Global Climate Change & Biodiversity Indicators
Area 18,Department of Biology
University of York, York, YO10 5YW, UK
Phone: + 44 (0) 1904 328645, E-mail: [EMAIL PROTECTED]
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