Short: I need to extract the data out of a CRD file our septic designer gave me. He has been unwilling to assist me other than providing me with the CRD file which from my research suggests I need to purchase Carlson software to get the 10 or so points of data in the file :/
How can I either extract the point information in this file as text or convert it to something QGIS or GRASS can consume for free?
Background and more detail:
I work in GIS for a living and I am a computer programmer specializing in GIS applications and data processing. My other "Job" though is building our forever home. I have used my knowledge of GIS, orthogonal mapping, surveying, etc to make this process faster and more accurate while allowing me to plan things at home before going to the site.
I am about to start the septic and wanted to confirm the stakes I have put in the ground using a combination of QGIS and my Emlid GPS devices are accurate to the drawings surveyed points.
I had to work backwards with just the drawings and survey the two known points then measure out from there in QGIS using symbology set to map units (ft in this case) to then find intersections of the symbology to set the points for the leach field ... in short I think I am where I need to be but wanted to confirm and requested the northing / easting / elipsoid / elevations etc from the designer for his two known points so I could hard code them into my Base unit while over top the known points. But all I was provided was the binary CRD file.
thought the designer would give map of survey, you could georeference in QGIS. maybe not.
PM me .crd and i will convert to .txt for you.
Might wanna try to find out if the data is scaled to ground or not.
I tried to take his PDF survey file and georeference it as a tiff in QGIS but I only have two known points so the resulting image isn't accurate when I go to measure the field dimensions. I have done this with success in the past for things like parcel maps which were paper based at the time but those spanned larger distances so the error wasn't as noticeable.
This is how I got my current points. (see attached)
<div>EDIT: also attached example of failed georeferencer on the tiff file</div>
The helmert lanczos seems to be more accurate (image 3 and I had to rotate the field to get it to line up with the image) but with my captured points I don't know what to trust here. If either of my captured points are off the whole field will be rotated.
If I had the designers northing/ easting for his known points I would still have to project out the fields edges but I feel it would be more accurate than what I collected with my base station / rover as I would have a manually entered point for the base to issue the RTK from vs an averaged point.
I know he uses the state plane ft for his projection. Not sure on the elipsoid but I do believe he was using corrections via NTRIP for sure, though IDK which CORS station he was referencing. I don't have access to NTRIP so normally I would setup a WKP with a base station setup over a 24hr period then process the data to establish the average and manually enter that into the base station.
When I was testing my equipment against his when he was here there were differences for sure but they were close.
The guy is slow to respond to any request. After looking at this drawings I realized an elevation mistake and I am waiting for a reply back on that as well.
