Dov Katz wrote: > It seems like it provides a decent database of world cities and their Lat / > Long. points.
have a look at: http://www.geonames.org/ (global places/postal zones/etc) http://geonames.usgs.gov/domestic/download_data.htm (stateside) > Also, their lat/long data (See sample values) dont seem to look quite right > for google/yahoo maps. Do you know how to convert them to the proper > coordinates? what does "dont seem to look quite right for google/yahoo maps" mean? what are "proper coordinates"? if you mean the data isn't aligning, could be several reasons. - i think google maps uses WGS84 as their datum, no idea what that db uses (it doesn't appear to be defined anywhere i can see, which is a BAD thing actually) but if it's not the same as google then stuff will look displaced. for example there's about a 600 meter difference between coords using WGS84 & the datum we used to use around here (indian everest 1975), which is a freaking huge difference if you're trying to drop mortar rounds on something. - could be as simple as google & that database using different concepts of "city center" - accuracy of the original data, if the database they used to geocode those locations didn't have good resolution, stuff could be off. for example, if you zoom out completely in google maps & try to drop a marker on say new york city (NYC) & then zoom in, you would more often than not find your marker wasn't anywhere near NYC. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:242877 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
