All the functions of the SitePlan apps - explained quickly and simply.
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Referencing a plan
2 min read
Web app
Mobile app
Open the desired plan that you want to georeference, click in the menu bar at the top on Settings and then to Referencing a plan.
Note: SitePlan would like to query your location: Click on Allow - This makes it easier for you to select the coordinate system.
Select 2-point referencing and click on Next.
Select the coordinate reference system to be used from the list. Coordinate reference systems that are available at your position are suggested. If the desired coordinate reference system is not in the list, you can search for it in the search field below. Then click on Next.
Move the crosshairs on the map to a known point, ideally near a corner of the map. Enter the right value/height value (local coordinates) or longitude/latitude (GPS coordinates) associated with the point and click on Next.
Repeat this process for the second reference point, ideally with a point in the opposite corner of the plan. The further apart the two points are, the more accurate the plan referencing will be. Then click on Finished. Your plan has now been georeferenced and is therefore available to all team members of the project as a „GPS map“. You can now navigate in the plan using your smartphone GPS (similar to Google Maps).
Note: Georeferencing in the web app may provide inaccurate results due to date changes in the selected coordinate system. This is sufficient for various orientation and localization purposes. For surveying purposes (staking out) using the PDF plan, georeferencing in the field with the mobile app+GNSS antenna is always required.
If you have already uploaded the plan, select it, click on the Gear wheel-symbol and then click on Referencing a plan.
Select 2-point referencing and click on Next.
Move the crosshairs on the plan to a known point that is also available in reality, ideally near a corner of the plan, and click on Set reference point.
Tip: The following must be observed when selecting the reference points:
the selected reference point should be as exact as possible, e.g. it should have been marked out by the surveyor
Existing manholes or house edges, for example, are not suitable for the most accurate plan referencing, as these may be inaccurately marked on the plan
The further apart the two points are, the more accurate the plan referencing is
Go to the selected known point with your smartphone and connected GNSS antenna, align the pole and wait until the accuracy has reduced to an acceptable value (e.g. 2 cm). Press the Current GPS positionand then to Next.
Move the crosshairs on the plan to a second known point that is available in reality, ideally in the opposite corner of the plan. The further apart the two points are, the more accurate the plan referencing will be. Click again on Set reference point.
Go to the selected, known point with your smartphone and connected GNSS antenna, align the pole and wait until the accuracy has reduced to a suitable value (e.g. 2 cm). Press the Current GPS position and then to Finished.
Select the coordinate reference system to be used from the list. Coordinate reference systems that are available at your position are suggested. Your plan has now been georeferenced and is therefore available to all team members of the project as a „GPS map“. You can now navigate in the plan with your smartphone GPS or with the GNSS antenna (similar to Google Maps).
Note: If you accidentally select the wrong coordinate system from the list, this has no effect on the measurement results when using 2-point referencing in the field.
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