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Extracting surface reflectance time series into a table based on date [message #86606]

Fri, 22 November 2013 06:25

Tereza Šmejkalová is currently offline

Tereza Šmejkalová
Messages: 1
Registered: November 2013

Junior Member

Hi, I am completely new to IDL, I have been working with R so far bud it is to slow for the amount of data I need to process. I have daily single band surface reflectance tiffs reprojected to Polar Srereographic projection and a Shapefile containing lake polygons each with unique ID sorted South to North. I somehow need to get a table which will contain for each lake pixel (row) an ID of a lake and for each date (column) extracted surface reflectance value. I would be grateful for any advice on how to do this.
Thank you

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Re: Extracting surface reflectance time series into a table based on date [message #86608 is a reply to message #86606]

Fri, 22 November 2013 06:50

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Tereza Šmejkalová writes:

> Hi, I am completely new to IDL, I have been working with R so far bud it is to slow for the amount of data I need to process. I have daily single band surface reflectance tiffs reprojected to Polar Srereographic projection and a Shapefile containing lake polygons each with unique ID sorted South to North. I somehow need to get a table which will contain for each lake pixel (row) an ID of a lake and for each date (column) extracted surface reflectance value. I would be
grateful for any advice on how to do this.

I would start by reading this article on how to ask questions of subject
experts that will most likely to lead to an answer:

http://www.catb.org/~esr/faqs/smart-questions.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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