Sorry this is a novice question. I am completely new to the GIS domain and inherited a parser that expects a .bil file to get elevation at latlon points.
From what little documentation there was, it seems like the USGS NED database has all the information I need, but it now only provides the 1deg grid files in ArcGrid, GridFloat, or IMG formats.
I tried using GDAL and QGIS to convert the data for the parser but whenever I query it for elevation, it gives me a long int.
EX: at (39.5, -104.5), if I query from https://nationalmap.gov/epqs/ it's 6207.71ft, my predecessor ingested data from here and returns 6220ft (not exactly the same but reasonable difference). However when I convert GridFloat to BIL then query, I get 1156302165. I have no idea what this number is or means. The parser thinks it's elevation.
My questions are:
Did NED used to provide BIL format and recently changed? My predecessor did not leave notes on where to get files and did not even have example files from when he loaded data. And this was only 1 year ago.
Both GDAL and QGIS tools seemed to convert successfully, I got BIL files but obviously something is wrong with either my parser or the conversion.
I've been reading a lot from this site as well as various gov sites but the only solution I can come to is to update the parser to read one of the 3 provided formats and hope it works.
I am asking for insight from experts since I am absolutely brand new to this field and it's data.