Wrong pixel value returned ?

[genaray]

So i got it working, it works for the sample geotiff file.

However i wanna use it for my own files... its called "pnv_biome.type_biome00k_c_1km_s0..0cm_2000..2017_v0.1" and contains a value from 0 to 31 for each pixel. Basically natural vegetation and biomes.

When i run the program for my desired geocoordinate, it returns insanly high values. Wrong values. Furhermore, one single "GetElevationAtLAtLong" call generates about 500mb garbage.

Any help here ?