There are some differences between NAD 83 and WGS 84 which may arise because of approximations made in a particular method ofĬomputing coordinates.
Gpsmapedit convert wgs8 to nad83 professional#
NOAA Professional Paper NOS 2, Article 22.
Reference that states an upper bound on the difference between NAD83 and Underlying survey data sets for the 2 systems, not the geodetic datum theyĪnd thus there's nothing you can really do to translate from one to theĬan someone point me to an authoritative, published (pref. On the datum, you couldn't possibly notice them.ĭoes your statement then imply that the discrepancy must be in the Yes, absolutely - I would certainly expect Microsoft to be using geocodingĭata from a private vendor, not TIGER. If so, it sounds like pretty ancient data to me. TIGER files were digitized from USGS Topographic maps on the NAD27. In position of over 100 feet, that is probably the problem. Substantial change to WGS84 (or to NAD83). If, in fact one datum is NAD27 instead of NAD83, then there is a WGS84) and there are significant differences for the _same address_.ĭoes your statement then imply that the discrepancy must be in the underlying survey data sets for the 2 systems, not the geodetic datum they use?Īnd thus there's nothing you can really do to translate from one to the other? NAD83) data and with the proprietary data used in MS Mappoint (allegedly I have geocoded a number of addresses with both TIGER/Line (allegedly To: 'Ed RE: Help translating NAD83 coordinates to WGS84 If the differences were only based on the datum, you couldn't possibly notice them.įrom: Michael Frumin Monday, Septem12:13 PM Yes, absolutely - I would certainly expect Microsoft to be using geocoding data from a private vendor, not TIGER. Any thoughts there?Īlso, I've seen the documentation for the +towgs option but I think it's pretty much over my head.Īny help would be awesome - it's for a cool new feature on There are plenty examples of using cs2cs with the +ellps parameter, but I don't know what ellipses are in use. WGS84 (Microsoft Mappoint maps, which use NavTech (?) data). These coords were generated by geocoding addresses with US Census TIGER/Line data but I'm trying to map them onto maps generated using I'm having trouble converting some US coordinates from NAD83 to WGS84. To: Help translating NAD83 coordinates to WGS84 The cs2cs command line you posted below converts from NAD83 to NAD83, and therefore no change should be expected.
Ignore it and treat the two as identical. If your coordinates come from TIGER/Line data, you are already dealing with errors several orders of magnitude larger than the datum shift. Unless your data is acquired with a precision of millimeters (literally) you can treat the two datums as identical.
In North America, NAD83 and WGS84 coordinates are so extremely similar that no conversion is necessary or appropriate in most cases.
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