Let’s go over the different ways Propeller supports 3D site surveys in local coordinates.ġ. We want to make it as simple as possible to do your work and that means ensuring your surveys are in local grid without hassle. How Propeller supports local coordinates automatically Propeller takes the calibration file (produced when you calibrate your site with a GPS rover) and reads the parameters to accurately project the grid data when building site models. As such, the further you get from that single point of calibration, the less accurate your data can be. In the latter system, your data is calibrated off a single point on the site, rather than multiple points. Some providers might ask you to pick an arbitrary coordinate reference system or use only one point on the site and no calibration file whatsoever. There are two ways a processing platform can support local coordinates: single or multipoint calibration.
#Coordinate grid software
GPS site calibration procedure-a.k.a setting up a local grid-isn’t too hard to follow, but getting all your 3D site surveys in those proper coordinates can be a pain depending on what processing software you use. Single versus multipoint calibration matters for your worksite
![coordinate grid coordinate grid](https://free-printablehq.com/wp-content/uploads/2019/07/graph-paper-coordinate-plane-graph-paper-school-tools-graph-free-printable-coordinate-plane-pictures.jpg)
Those can extend into the millions of meters or feet, making them harder to work with. You want a smaller magnitude for your site coordinates than state plane or a national grid system offers.The region and/or size of your site means that using a standard ellipsoid would subject your survey measurements to high distortion.You want your site’s coordinate system separate from dynamic global geodetic systems, like WGS84, NAD83, GDA94, which get revised regularly.It’s beneficial for your site to operate in ground coordinates rather than grid coordinates.You can choose to use local coordinates for a number of reasons: Everything is then measured in reference to an non-moving point on the site instead of a national or global datum. Local grids measure positions on a site relative to a point placed on site, as a surveyor chooses. Worksites in the construction, mining, and aggregates industries often use local grid coordinates instead of published coordinate systems. How Propeller supports local coordinates automatically.
![coordinate grid coordinate grid](https://i0.wp.com/infinityisreallybig.com/wp-content/uploads/2019/05/BlankAxesWithGridlines.png)
Single versus multipoint calibration matters for your worksite.Why you might be using local coordinates.Here’s where we’re going, if you want to jump ahead: