I am trying to locate an area that is currently in GML format. I know it is somewhere in Istanbul but I need to know which Coordinate Reference System (CRS) it uses to overlay it with other maps. However, the code does not include the name of the utilized CRS. I added the coordinates of a building from the GML below. Could someone please help me to find out the CRS associated with these coordinates?
<gml:posList srsDimension="3"> 425883.554 4534249.139 46.709 425881.290 4534249.821 47.428 425877.212 4534247.779 47.835 425883.554 4534249.139 46.709 </gml:posList>
TLDR, I understand that this somewhat resembles UTM Coordinates. Although the North value seems correct for UTM, the East value does not.