I am a research student who is only new to GIS and I am using ArcMap- so I apologise in advance for my basic question. I am using the CGS_WGS_1984 coordinate system for my project in arcmap. I just had a question in relation to the ASTER Global Digital Elevation Model products (version 2).
Basically, I have particular points of interest (villages) and I want to extract the elevation values for each of these points, using elevation information I obtained from ASTER GDEM.
Now I just want to know if these ASTER DEM tiff files can stay in the GCS_WGS_1984 format to extract the elevation values from the points, or if I have to convert the ASTER GDEM layers to a projected coordinate system first? If so, do I then have to convert all of my other layers to this projected coordinate system?
Thank-you and I apologise for the basic question- the way ASTER products are imported etc. seems to have changed over the years.
أكثر...
Basically, I have particular points of interest (villages) and I want to extract the elevation values for each of these points, using elevation information I obtained from ASTER GDEM.
Now I just want to know if these ASTER DEM tiff files can stay in the GCS_WGS_1984 format to extract the elevation values from the points, or if I have to convert the ASTER GDEM layers to a projected coordinate system first? If so, do I then have to convert all of my other layers to this projected coordinate system?
Thank-you and I apologise for the basic question- the way ASTER products are imported etc. seems to have changed over the years.
أكثر...