Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
Re: how to rasterize point data with IDL
On Jan 10, 12:17 am, "R.Laymon" <ray.laymon...@gmail.com> wrote: > Dear all, > > I have a x(lat), y(long), Z(data) type of daily data for 8-years. I am > trying to rasterize these point data to create daily spatial maps (365 > days x 8 years = ~ 3000 images). There is an in built ENVI function > Vector/Rasterize Point data. Since I need to create ~3000 images and > doing that manually one by one is not time-wise reasonable with ENVI, > could anybody tell me if I may and how can I use this function in IDL? > Thx! > > Ray There are of course several ways to do this, but perhaps the easiest for you would be to use ENVI_GRID_DOIT, which is the programmatical equivalent of the Rasterize Point Data command you see in the GUI. ENVI help for the command has an example to get you started. See if that fits your needs. Jeff
On Jan 10, 1:38 am, "Jeff N." <jeffnettles4...@gmail.com> wrote: > On Jan 10, 12:17 am, "R.Laymon" <ray.laymon...@gmail.com> wrote: > >> Dear all, > >> I have a x(lat), y(long), Z(data) type of daily data for 8-years. I am >> trying to rasterize these point data to create daily spatial maps (365 >> days x 8 years = ~ 3000 images). There is an in built ENVI function >> Vector/Rasterize Point data. Since I need to create ~3000 images and >> doing that manually one by one is not time-wise reasonable with ENVI, >> could anybody tell me if I may and how can I use this function in IDL? >> Thx! > >> Ray > > There are of course several ways to do this, but perhaps the easiest > for you would be to use ENVI_GRID_DOIT, which is the programmatical > equivalent of the Rasterize Point Data command you see in the GUI. > ENVI help for the command has an example to get you started. See if > that fits your needs. > > Jeff Hi Jeff, It worked great. That was exactly what I was looking for. Thanks a lot for your help. Ray
On Monday, 11 January 2010 00:31:24 UTC+5:30, R.Laymon wrote: > On Jan 10, 1:38 am, "Jeff N." <jeffnettles4...@gmail.com> wrote: >> On Jan 10, 12:17 am, "R.Laymon" <ray.laymon...@gmail.com> wrote: >> >>> Dear all, >> >>> I have a x(lat), y(long), Z(data) type of daily data for 8-years. I am >>> trying to rasterize these point data to create daily spatial maps (365 >>> days x 8 years = ~ 3000 images). There is an in built ENVI function >>> Vector/Rasterize Point data. Since I need to create ~3000 images and >>> doing that manually one by one is not time-wise reasonable with ENVI, >>> could anybody tell me if I may and how can I use this function in IDL? >>> Thx! >> >>> Ray >> >> There are of course several ways to do this, but perhaps the easiest >> for you would be to use ENVI_GRID_DOIT, which is the programmatical >> equivalent of the Rasterize Point Data command you see in the GUI. >> ENVI help for the command has an example to get you started. See if >> that fits your needs. >> >> Jeff > > Hi Jeff, > > It worked great. That was exactly what I was looking for. Thanks a lot > for your help. > > Ray Hey, i'm jigar from india, working on ENVI + IDL.....ENVI_DO_IT function working properly which example given in help but my own data i cant rasterize. in my ascii file, there id x,y and z as x->lat y->long means location z->temperature data i have upto 150 data each x y and z in example there is given that... x_pts = [0, 500, 500, 0, 250] y_pts = [0, 0, 500, 500, 250] z_pts = [0, 100, 200, 300, 1000] now i have to assign all lat, long points to x and y and assign temperature data to z_pts.... am i write? but my problem is that ..... how to assign my x,y and z data which i have in form of x-> image.x y-> image.y z-> image.z but how i can assign thai all x,y,z into x_pts, y_pts and z_pts???? plz reply me soon