Are the circle and scalebar dependent on each other?

Question

Hi everybody
When I enter a radius of 500km when drawing on the map the diameter of the circle will be 1000km and will be equal to the scalebar line in the lower right corner. But the problem is that when I draw on the map, the circle is smaller than the scalebar in the lower right corner. And I want to confirm that circle and scalebar are dependent on each other? If so, how can the drawn circle be equal to the line of the scalebar in the lower right corner? On the contrary, if they are not dependent on each other, please give me a link to prove it. Thank you

Faiez · Answer

Hello! 1.

Circle

2.

Circle

3. https://www.mapdevelopers.com/draw-circle-tool.php?circles=%5B%5B500000%2C59.3251172%2C18.0710935%2C%22%23AAAAAA%22%2C%22%23000000%22%2C0.4%5D%5D 4. When a marker or a circle icon addet to the map, it is associated with the map. Good luck, Faiez

nhanvi · Answer

Hello, @Faiez Do you know how to implement it via Javascript API? I had the same issue. my map uses WGS 1984 Web Mercator whenever I draw a ring the ring is slightly smaller than the scalebar.

Faiez · Answer

Hi!

As Bob has mentioned, it is very important to select the right GCS and PCS for your map and layers. GCS defines the location of data on the earth's surface while the PCS draw the data on a flat surface.  If you want to create a concentric ring and display it on the google earth here is the option:

1. Open the project> in case of need you can add a layer> otherwise just use the map.

2. Cliks Insert>Distance and Direction tab on thr ribbon> select ring>

3. Fill the table

4. click create. if you want to display it on the google earth export it as a KML.