1. Intercept the map area to be measured from the satellite map (save it as a picture).
2. Open the compass software with transparent background and import the picture of step 1 into the compass.
The following is an example for your reference. In this example, you need to install a software called Yi Li Shi Zhi on your mobile phone. The brief steps are as follows:
1. Open the software on the mobile phone, open the geomantic compass function in the software, and click "Operation Area", as shown below:
2. In the above figure, click "Surveying and Mapping Satellite Map", as shown in the following figure:
3. In the above figure, click "Open Map", select the image captured from the satellite map (ensure that the captured satellite image has been saved in the mobile phone), and click "OK" to open the satellite map, as shown in the following figure:
Here:
Through the "red dot" in the middle of the compass, the center point of the compass can be moved to the required position;
Move to the larger "red dot" in the figure to translate the whole compass (the measuring line also translates);
By moving to the "red arrow" in the figure (the arrow on the right in the figure), the measuring line can be adjusted to different directions.
So you can test the satellite map (hint: in the satellite map, it is directly above the north).