Check category by enter utm coordinate

Xin Zhuang zhuang at
Thu Aug 12 10:39:00 EDT 1993

Can you create a ground truth map?

If yes, you should be able to get the producer's accuracy
with several GRASS commands by comparing the classification
result lay with the ground truth layer.

zhuang at

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Dear Sir:
I can not create a ground truth map, since I only have over one hundred ground truth sample points spread over my study area. If I have the ground truth map, I will just use it and I don't need to make classification. I think I forgot to tell you that I am doing supervised classification for the Landsat MSS digital images. I need to know how good is my classification. I got over one hundred sample points of forest types information from other Company. That's why I need to check each sample point on the classified map then calculate the percent correct.
Thanks for your suggestion.

John Wu

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