Grid to Ground for an Orthomosiac image

EricClay — Thu, 09 Jan 2020 17:53:19 GMT

I recently started with a Land Surveying firm and they asked to dive into my GIS and Imagery background to see if I can orhtomosiac their drone imagery for use in CAD. It has been about 5 years since I lasted worked in GIS and imagery so I am trying to get my mind back into it while also learning the surveying side.

Grid 2 Ground is a concept I didn't even know existed until I started here, so I have still been working on wrapping my head around it. I was wondering if someone would not mind helping me with my thought process on this to see if I am on track and if this is even possible in Arc with imagery.

So my issue is that I have Drone imagery collected by the survey teams and I am wanting to convert this data to the Colorado Central State Plane Coordinate System while applying a scale factor to the image to project it from Grid to Ground.

From what I have been able to find out I am pretty sure my answer involves creating my own coordinate system and adjusting the false eastings and northings using my scale factor and then running a projection on the orthomosiac, but I am not quite sure how I would calculate my needed values.

Drone Data Collected in UTM, zone 13N WGS 84,

Survey data collected in Colorado State Plane Central 0502, NAD83

Grid to Ground Scale factor = 1.000386512227

I'd appreciate any help or guidance if anyone else has ran into these issues.

Thank you,

Eric

topic Grid to Ground for an Orthomosiac image in Coordinate Reference Systems Questions

Grid to Ground for an Orthomosiac image