| 24 | | While National Spatial Reference System 2007 )NSRS2007) has been around for several years, the shift defined by the new system, relative to the previous system (NAD83/96, aka HARN, HPGN, NAD83/91; we'll use HARN in this RFC document) was considered to |
| | 24 | While National Spatial Reference System 2007 )NSRS2007) has been around for several years, the shift defined by the new system, relative to the previous system (NAD83/96, aka HARN, HPGN, NAD83/91; we'll use HARN in this RFC document) was considered too small to deserve a defined shift definition. That is, the shifts were on the order of a few centimeters and at that time this was considered to be as small as the level of error. Fats forward to 2013, and precise and definitive geodetic shift models have been developed for NSRS2007. This was done at the time the US National Geodetic Survey was defining the National Spatial Reference System of 2011. Thus, at the current time, definitive models and algorithms exist for the migration of geodetic coordinates from HARN to NSRS2007 and subsequently to NSRS 2011. |
