# How can I find the exact value of the corresponding point in specific longitude and latitude?

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Farshid Daryabor on 18 Oct 2019
Commented: Farshid Daryabor on 21 Oct 2019
I have problem to extract exact value in projection coordinate, I actually want to extract the exact value of the point with a specific latitude and longitude (e.g., lat=45.2 and lon=28.7) from the attached data. I really appreciate anybody can help.

Andrei Bobrov on 18 Oct 2019
What is it xy.mat?
Andrei Bobrov on 18 Oct 2019
comment by Farshid Daryabor:
I really appreciate your prompt response
"xy.mat" are the projection 'x' and 'y' coordinate in meters.

Andrei Bobrov on 18 Oct 2019
Edited: Andrei Bobrov on 18 Oct 2019
F1 = scatteredInterpolant(LAT,LON,data)
F2 = scatteredInterpolant(LAT,LON,xx);
F3 = scatteredInterpolant(LAT,LON,yy);
lat=45.2;
lon=28.7;
out = [F1(lat,lon),F2(lat,lon),F3(lat,lon)];

Andrei Bobrov on 18 Oct 2019
comment by Farshid Daryabor:
Dear Andrei
What do you mean 'lon' and 'lat' in the following comment, is especific lon & lat for example lat=45.2 and lon=28.7?
out = [F1(lat,lon),F2(lat,lon),F3(lat,lon)];
Andrei Bobrov on 18 Oct 2019
Yes.
Farshid Daryabor on 21 Oct 2019
Dear Andrei,
it's weird for me, the power of values derived from "out = [F1(lat,lon),F2(lat,lon),F3(lat,lon)]" is compeltly different from the expected power from "var = F1.Values". For instance,
>>max(var)
5.9794e+03
While
>>max(out)
5.9794e+06
?