howto calculate a distance between 2 cities ?

[nisha chaudhary]

i am working on project of online courier service and i have to calculate distance between 2 cities .how i can calculate distance between 2 cities using jsp code?

[gits]

JSP has nothing common with JavaScript ... even though you might use JavaScript for such a task by making a google routeplanning request with an AJAX call to retrieve the distance. I think you could even do that serverside with JSP ... but in both cases ... you would need to call a geo-service to get that distance.

regards

[RedSon]

Oh, I was going to say add the squares of the difference between the two points X and Y positions and then take the square root of that, and you will have an approximate distance.

[gits]

hmmm ... of course ... you could even try with the linear line ... . but it wouldn't consider any special conditions like a river between the places or similar where you would have to go miles more to reach a brigde to cross it ... i guess for a courier service that might be important ... especially when that is going to be the base for tour-planner ... a map-service would consider most of such conditions ...

kind regards

[RedSon]

Well we need to find out if this is a theoretical question, or one for an actual enterprise product?

[nisha chaudhary]

JSP has nothing common with JavaScript ... even though you might use JavaScript for such a task by making a google routeplanning request with an AJAX call to retrieve the distance. I think you could even do that serverside with JSP ... but in both cases ... you would need to call a geo-service to get that distance.

regards

thnks.but how to get that geo service to calculate

[nisha chaudhary]

will u provide me code for finding out distance

[gits]

you would need to use a map-service in case you want to that. for a start have a look here for example ... and here for the API reference.