After creating the Distance Time Speed calculator I thought about creating a calculator for finding distance and bearing from two locations, or a second location from a location, distance and bearing. While investigating how to do this I discovered how to get a current location so I integrated this in the tool as well.

I also added the abilities to convert between three formats of latitude/longitude and to pass a distance to the  Distance Time Speed calculator.

Here is a screen shot of the tool on an iPad.

To use this tool you enter a location as a latitude/longitude pair.  You can enter a location manually, or get your current location, if supported by the device.  In this example, I get my current location by pressing “Set Current Location” (press it 2 or 3 times for the best accuracy).

It found my current location, with an accuracy of 16 feet.  Next, I enter Location 2 in the format “dd mm ss” for a latitude of 35° 35′ 32″ N and a longitude of 081° 02′ 13.6″ W. The tool accepts latitude and longitude in several different formats. This lets you copy and paste from other tools, such a Google Earth.

When I press “Submit” I get the distance (in nautical miles and feet) and the bearing (in true degrees).

The distance is 1.436 nautical miles, or 8722 feet, and the bearing is 145 degrees true.

There are three formats for displaying latitude and longitude. (The tool will keep the original precision independent of the display format chosen.) If I want to see my locations in a different format, I can use the tool to convert between formats. In this example I want to convert from degrees minutes to degrees minutes seconds. I press the “Format” button and select “dd mm ss”.

When I press “Submit” the format will change.

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If I want to calculate the speed to get from Location 1 to Location 2 in 21 minutes, I can send the distance to the Distance Time Speed tool by pressing “Send to Dist Time Speed Calculator”.

Then I enter 21 minutes.

When I press “Submit”…

I see that my speed is 4.1 knots, or 4.7 mph.

In the next example I calculate where I will be if I travel from my current location for 1.42 nautical miles at a bearing of 43 degrees true.

When I press “Submit” I will see the latitude and longitude of my location.

The formulas used by this tool are not 100% accurate so you may see some difference if you calculate a distance and bearing and the use the results with Location 1 to calculate Location 2.

Another feature of the tool is the “Swap” button. This will swap Locations 1 and 2. You can use this feature to calculate the distance and bearing traveled between two locations. For example, press “Set Current Location” as you start of your trip. (You  may better accuracy if you press it 2 or 3 times.) When you finish your trip press “Swap”, “Set Current Location” (2 or 3 times) and “Submit” to see distance and bearing traveled.

I learned a lot developing this tool and I think that I came up with something useful.  At least I think it will be useful. Hopefully you will too.