Think about it more carefully. If you are 1m south of the north pole, then walk pi meters east or west, your longitude changes by 180 degrees. At the equator it changes hardly at all. This is hard to do accurately and correctly over the whole earth. Google geographic coordinate transformations. There is free software available at http://earth-info.nga.mil/GandG/geotrans/index.html . If you only need approximate answers or your distances are short, you can use spherical geometry, which is not so bad.
On Jul 15, 11:03 am, siddharth srivastava <[email protected]> wrote: > Hi > > On 15 July 2010 07:37, Tech Id <[email protected]> wrote: > > > This seems to be asked in context of google maps. > > I asked in terms of OSM. > > > > > While drawing map at a particular zoom level, ratio of map-area-on- > > screen and shown-latitudes/longitudes-area is known. > > So, x meters can be converted to latitiude/longitude difference easily > > by this ratio. > > would it change then ? > > > > > > > > > On Jul 15, 12:59 pm, siddharth srivastava <[email protected]> wrote: > > > Hi > > > > If I have a (latitude, langitude) as well as pixel positions of those > > > locations, then how can (longitude, latitude) or pixel coordinates of a > > > point x metres away can be found ? > > > > If this information is not enough, what else information might be > > required ? > > > > -- > > > Siddharth Srivastava > > > > When you have learned to snatch the error code from the trap frame, it > > will > > > be time for you to leave. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Algorithm Geeks" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]<algogeeks%2bunsubscr...@googlegroups > > .com> > > . > > For more options, visit this group at > >http://groups.google.com/group/algogeeks?hl=en. > > -- > Siddharth Srivastava > > When you have learned to snatch the error code from the trap frame, it will > be time for you to leave. -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
