Re: Geocoding & Route Directions Identification using MFC
- From: "Keith" <k.cowan@xxxxxxxxxxxxxxx>
- Date: 25 Apr 2006 08:24:18 -0700
yasodhai@xxxxxxxxx wrote:
Hi,
I am PG student doing my final sem project. I have to retrieve the
details of Latitude and Longitude for a particular location. Also I
need to extract the route map of india between any two locations.
Kindly inform me if any APIs are available for that.
Advance Thanks,
Yasodhai
First thing you need to do is get hold of some vector map data for the
country you are interested in. This usually costs money! Then you'll
need to write your own data structures and code for loading and storing
this data. Then you'll need to code something like a travelling
salesman algorithm to map the shortest distance between each node in
the map data and persist this information to disk (that's how I'd do it
anyway).
You may well also need to purchase some gazetteer information for the
country (which gives you coordinates for each town and/or postcode in
the country. Then you need a lovely GUI that lets you choose two
locations from the gazetteer, creates virtual map vectors to link you
into the nearest nodes in the real map data, and uses the stored
shortest distance data plus the lengths of the two virtual vectors to
give you your answer. You should even be able to display the exact
route in vector map form...
And no, there are no APIs that I know of for any of this!
Regards,
Keith
.
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