comp.lang.idl-pvwave archive: archive » extract raster statistics from vector

Home » Public Forums » archive » extract raster statistics from vector

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

extract raster statistics from vector [message #82127]

Mon, 19 November 2012 14:48

Danxia
Messages: 10
Registered: September 2012

Junior Member

Dear all,

I'm looking for a simple/efficient way to extract raster statistics from vector file in IDL/ENVI+IDL. Here's my question:

I have a raster image, say temperature, for a country and an administrative boundary shapefile, say state level, with the same projection.
I want to get state's mean temperature from the raster image.

I know I can extract raster image based on vector file and save to another file, and then get stats. However, considering the large number of states, I prefer a more efficient and less space-consuming way rather than saving states' raster image to the disk. For example, get an array of each state based on the query of the state's name?

So anybody has any idea or inspiration to pursue this in IDL/ENVI+IDL?

Thanks a lot.

Danxia

Report message to a moderator

Re: extract raster statistics from vector [message #82277 is a reply to message #82127]

Sat, 24 November 2012 03:17

Fabzi
Messages: 305
Registered: July 2010

Senior Member

On 11/19/2012 11:48 PM, Danxia wrote:
> Dear all,
>
> I'm looking for a simple/efficient way to extract raster statistics from vector file in IDL/ENVI+IDL.

Hi,

IDLanROI and ->computeMask could be helpful:

http://www.exelisvis.com/docs/IDLanROI.html

Fab

Report message to a moderator

Previous Topic:	Re: Device Coordinates vs Normalized Coordinates
Next Topic:	Re: cgplot and eps

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 15:18:44 PDT 2025

Total time taken to generate the page: 0.00535 seconds