Hi Jacky,
> I would like to know if anyone has successfully plotted temperature (or
> someother variable) with respect to longitude and latitude. Please can
> someone give me some hints on how I can accomplish this. My aim is to come
> up with a contour graph, where the position of a weather station is defined
> using longitude and latidude, and the data i.e. temperature will then be
> shown as a contour (presumably using VisAD's contour class). So for every
> weather station there will be a point on the map, my problem is to specify
> the location using some sort of array or tuple, also the data needs to be
> stored about temperature, wind, etc. I have looked at the examples i.e
> P4_01, P3_0x, etc and tried modifying them to meet my need, but I have done
> so with little success
> I know this is not uncommon and has been done before, so I would
> appreciate it if someone can tell me how I can accomplish my task, or where
> I should be looking at.
Start with P3_05.java from Ugo's tutorial, but substitute
an Irregular2DSet for the Linear2DSet in domain_set.
Something like:
int n = ... // numbber of weather stations
float[][] samples = new float[2][n];
for (int i=0; i<n; i++) {
samples[0][i] = ... // latitude of station i
samples[1][i] = ... // longitude of station i
}
domain_set = new Irregular2DSet(LatitudeLongitudeTuple, samples);
Then also:
float[][] flat_samples = new float[1][n];
for (int i=0; i<n; i++) {
flat_samples[0][i] = ... // temperature at station i
}
Good luck,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html
