Tark
lvl.1
United States
Offline
|
Hi yall,
Been reading a lot of your posts on reproducable accurate mapping. I'm trying to get decent relative reproducable accuracy (doesn't necessarily need to be survey quality, just mostly repeatable) over a relativly large area without hiring a professional surveyor to come out and mark GCP's and check points all over our area of interest. Which I know is the only way to guarantee accuracy. I'm hoping the NTRIP network in my area will mostly fix this, but just like most things DJI they make it sound like all ya do is plug a dongle with a GSM sim card in and away you go, but my only options for mount points are VRS_CMR, CRS_CMRx, and VRS_RTCMv3. The only info I've been able to find on compatability is in the question and answer section here. It's not official from DJI, but it says 3 options with RTK are :
1. Connect locally via OcuSync to your D-RTK 2 Mobile Station. (RTCM3.2)
2. Connect remotely via a 4G Dongle to a custom RTK network using a NTRIP account.(RTCM3.2)
3. Connect remotely via a WiFi hotspot to a custom RTK network using a NTRIP account. Not available in Europe.(RTCM3.0/RTCM3.1/RTCM3.2)"
So does that mean without access RTCM 3.2 the dongle sim card option is useless? Basic background in GIS and spatial analysis, but not surveying. So if anyone has any info on this please explain like I'm 5.
Thanks!
PS. Might as well get opinions on what I'm thinking second option is if this NTRIP doesn't work or doesn't give me the desired end product and can't get the bosses to spend the dough on a surveyor.
At the moment my workflow is setup base station. Take note of and mark on ground where base records location (for manualy entering in lat long during next flight for repeatability) mark a location towards the end of my flight path, fly area, process images into ortho, use GIS to get lat/long of next "Known location" on my new ortho, place base station over marked location, manually enter lat long in acquired from GIS, and repeat through my area of interest in order to create a relative accuracy to the original base station. So far my tests seem to be atleast matching pretty seamlessly. Haven't even started trying to get dsm's to stitch, so if anyone see's any potential issues this workflow could cause for stitching dsm's I'd love to hear about it. More tests today. I'll update results if there is any interest.
|
|