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What to do with Google Earth inaccuracies

VIY5-1500 Ground Penetrating Radar

VIY5-1500 Ground Penetrating Radar

Concrete scanner VIY5-1500

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Synchro Software

Synchro Software

Synchro program is designed for: - GPR control - GPR data imaging - Processing (filtering) of sounding result

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VIY5-600

VIY5-600

The VIY5-600 Ground Penetrating Radar (GPR) can be used for location and analysis of underground objects using electromagnetic pulse radiation, up to 3,5 meters depth. The VIY5-600 GPR is suitable for searching of both metallic and dielectric objects (utilities, voids, fondation constructions, etc.).

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Planner Sofware

Planner Sofware

Planner program is designed for: Imaging of GPR profiles on the location plan GPR profiles position editing Objects? markers editing Export of GPR profiles and GPR markers to AutoCad Making graphic reports with addition of inscriptions and other graphic elements

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Geological surveys

Geological surveys

GPR is used for location and analysis of underground anomalies using electromagnetic pulse radiation.

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GPR Bathymetry

GPR Bathymetry

GPR provides water depth and sub-bottom stratigraphy in freshwater lakes and rivers. Surveys can be carried out from small boats, rafts or even through the ice.

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VIY5-600

VIY5-600

The VIY5-600 Ground Penetrating Radar (GPR) can be used for location and analysis of underground objects using electromagnetic pulse radiation, up to 3,5 meters depth. The VIY5-600 GPR is suitable for searching of both metallic and dielectric objects (utilities, voids, fondation constructions, etc.).

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The VIY software package by Transient Technologies has the option of exporting a GPR project to the free Google Earth software from Google. Displaying GPR data on live Google maps is convenient, visual and simple.
GPR data in the Google Earth

However, is Google Earth a real GIS? Here's what Google responds to this:
"Google Earth is not a Geographic Information System (GIS) with the extensive analytical capabilities of ArcGIS or MapInfo, but is much easier to use than these software packages. ... "

What does this mean for users of GPR?
After exporting the project from the Planner program to the KMZ format for Googe Earth, users sometimes found that the GPR data was shifted relative to the image of the Earth's surface. In our case, the shift was about 4 m.
inaccuracies o the Google Earth

Moreover, we can be sure of the accuracy of our GPS data, they were checked with the second set of DGPS receiver. The inaccuracy was 0.6m.

So, to more accurately combine GPR data with the Google Earth plan, you need to do the following:
- in Google Earth, we determine the required shift of the georadar project
- in Google Earth, next to the reference point of the GPR project add Placemark and place it with the required shift
Add new Placemark with needed shift

- open the Placemark properties from Google Earth
Coordinates of new reference Point

- in the Planner project, click on the project branch in the object tree


- then in the lower part of the window, click on the button next to the coordinates of the reference point of the project, a window for setting coordinates will appear


- copy the coordinates of the Placemark from Google to the coordinates in the Planner program in "Coordinates of Reference Point in Google Erarth"



- save the GPR project in the Planner program.
Now the export to Google Earth looks like this.
Export to Google Earth looks like this
In details
Export to Google Earth looks like this

for comparison without correction
inaccuracies o the Google Earth

An important point needs to be made here. This coordinate correction only affects the result of export to Googler Earth and does not change the coordinates of the data in the Planner project and also does not affect DXF export (for Auto Cad)

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