I have a range defined by an intersection and a number of feet away from the intersection. (e.g. 100 ft north of Washington St. & 5th St. to 300 ft south of Washington St. & 6th St.)
I am looking to geocode this into a lat/long pair. However, I cannot see any way to get Google Maps API or Virtual Earth, etc. to do this. They will happily geocode the intersection, but not the distance away. I can't just add 100 ft because the road doesn't necessarily go exactly straight or exactly in a cardinal direction.
I investigated getting the polyline that describes the road, but am not having much luck with obtaining that either from Google/VEarth. I looked at TIGER/LINE from the US Census but their data is very inaccurate.
Can anyone make a suggestion for how to geocode this? This is for a public map, so any of the free APIs from Google, Microsoft, etc. should be fine.
Ultimately, by the way, I'm looking for an actual street address rather than coordinates. I want to know that the range in the example I gave above, for instance, would be 508 to 563 Washington St.
I ended up taking a different approach -- rather than geocoding to house numbers, I use percentage up the street. I can therefore get away with calculating the length of the street and then determining how far up the street the geocoded coordinates are.