MapForums

Hello,
Any one wants to share knowledge regarding how to get new latitude and longitude from speed after defining default latitude and longitude. As in mine case I am not using GPS hardware just make pushpin as random and placing it in loop so that it will act as moving on map.
Hope to hear from you guys.
Regards.
Gul

I'm not sure I understand.. you want to get a new position based on the speed (and direction ?) and starting position?

Eric

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Well I have lat & lon as inputs and I want to calculate how much lat & lon has to change when a object is moving with a defined speed. Only the direction will be random in this case so that it will act as mine pushpin keep on moving.
Regards..

Does the pushpin need to stay on the road network? Or just move in a different random direction say every second?

Eric

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Yes it keeps on moving (specified interval,u can say 1 sec) after getting randomly speed which will keep on adding with input latitude & longitude.
thanks.

The speed is random or the direction is random or both?

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As per ys
i want both.
Well in mine mind I will get ground speed from NMEA(GPRMC), and it will place in random then add it in both Lat & Lon so that it will keep on changing the speed randomly and because of this direction will change.... am I right.
Or you have some better idea.

I'm sorry.. I still don't get it. So you're getting actual speed from NMEA(GPRMC) or a device, but you don't want to plot an actual position.. just have it move randomly at that speed, changing direction every second?

I guess it might help to take a step back and explain the purpose of what you are trying to do..

Eric

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Well let you describe from start. I want to develop an application which don't use hardware. In mine project i have inputs for Latitude & Longitude. I want to show it on map as random like moving object and calculate how much lat & lon has to change when a object is moving with a defined speed, Only the direction will be random(like moving onject). (its more like data comes from original GPS but in this i am not using GPS hardware, just act as dummy).

Code:

In mine mind i think if i will set some default speed in the beginning with lat & lon, it keeps on showing me next position if i will use 
random(input speed);
 so what do u think about it.

Nasir

Is it supposed to be a vehicle on the road network? Or a creature like a bird that could just fly anywhere?

What country or what part of the world are you working it? In the U.S., one degree of longitude is roughly equal to 50 miles or 80 km, and a degree of latitude is equal to 65 miles or 105 km.

It would be rough, but with some simple math and the Pythagorean theorem you could calculate how much to modify lat/lon each second for a particular speed and direction.

How far did you get with your code, what do you need help with specifically?

Eric

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