Usually you or a surveyor working with you would generate those.Anyone know where I can download csv files with surveyed GCP data?
Anyone know where I can download csv files with surveyed GCP data?
Thanks
Maps made easy has what they call “a new way to get highly accurate aerial maps without the cost”. By importing gcp points over an existing image and then adjusting it to match the gcps.I'm not following your thought process. Those are created by you (if you're capable) or a survey team for the job/site in question.
If I'm totally missing the boat I apologize as it is late here lol
Or do they mean for you to generate some GPSs to use together with readily available aerial imagery?Maps made easy has what they call “a new way to get highly accurate aerial maps without the cost”. By importing gcp points over an existing image and then adjusting it to match the gcps.
They make it sound like csv files with gcps are just available for anyone to download.
I think you are absolutely right.Or do they mean for you to generate some GPSs to use together with readily available aerial imagery?
You need the GPSs to be close in/around the imagery.
I don't think you are going to find a handy file of GCPs that just happen to be exactly where you need them.
Maps made easy has what they call “a new way to get highly accurate aerial maps without the cost”. By importing gcp points over an existing image and then adjusting it to match the gcps.
They make it sound like csv files with gcps are just available for anyone to download.
I mean I know where a couple surveyed gcp points are nearby. But that’s about it.
AgreedThe way I understand it, MME touts this feature as a way to use GCPs after a map has been processed, almost like rubber sheeting the ortho. GCPs would still need to be surveyed to be an improvement. The 'GCP' would need to be some immovable target also found on the initial map ('tree stump').
I'd imagine you could only get that from the Survey company which mapped out the GCPs. Usually you just export the CSV from the GNSS receiver after job completed. With the prices that are charged for surveying I'm not sure this would be a free commodity.Anyone know where I can download csv files with surveyed GCP data?
Thanks
My remarks were for the OP not having the correct equipment to do things "right".GSD and location are not the same thing. GSD is Ground Sampling Distance and measures from the center of one pixel to the center of an adjacent pixel. Fancy word for resolution. Grabbing a lat/lon location off an aerial within someone else’s GIS puts you at the mercy of their projection work.
On the sister commercial dronepilots forum there is a current discussion on how an appeal ruling in a drone mapping case played out. The thread contains some of your valid points in it.I just didn’t want the OP to read it as “take location data from the GIS and roll on” so I added what I did.
As a PLS I get a bit cringy with some of the way folks describe, advertise and promote their business in relation to location services, especially use of the word “surveying” as that’s the quickest way to get a state board to come down on you (see NC). There’s a LOT of bad info out there concerning such and I only expect it to get worse.
It will get ugly when a client has a costly error arise as a result of a non licensed deliverable and their attorneys and insurance company goes to work avoiding paying out an E & O claim…..
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