Click here to open GPS nagivation on Google Map 

 

Contour line  is available in US only. 

High density contour  is only available in California (max zoom level 18) and Hawaii (max zoom level 19).

Low density contour  is available in US 48 states (max zoom level 15) and Alaska  (max zoom level 15

 

 

MGRS gzd and 100km is available in the whole world

10km is available in North America and Asia only, Europ is not available.

1km is available in USA only. Max zoom level is 15

Beyond zoom level 15, no more MGRS grid.

 

 

 

 

 

 

How to use 

          If this map is NOT showing your current location ( instead showing London UK by defaultthat means you have not enable location service.  By default, Mac system privacy and browser both will block location service, you have to enable by any of these options.

        If browser popup a dialog window ask you if you want to allow or block your location, click allow

              OR Open Mac System Preference ---> Security & Privacy ---> Privacy --->  Location Services --->

 ---> check Enable Location Services   ---> check Safari or opera or chrome or what ever browser you are using.

 

 

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Google Maps Javascript Version

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Leaflet

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Note:

Dense materials (such as concrete, rock, steel, heavy wood), tall buildings, terrain features (like mountains, ridges, and cliffs), and large trees can block or degrade GPS signals and may make it impossible to determine your location. It is well known that the ordinary Global Positioning System (GPS) fails to provide location and time information under waterThe reason is that the electromagnetic signals from the orbiting satellites are heavily damped in water and hence can not be detected by the receiver in most cases of interest.

              Therefor GPS device used in US Airforce Navy Marine Army must work without GPS signal without internet without cell phone signal and any other radio signal.

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