diff options
| author | Even Rouault <even.rouault@spatialys.com> | 2019-12-16 20:27:09 +0100 |
|---|---|---|
| committer | Even Rouault <even.rouault@spatialys.com> | 2019-12-16 20:27:09 +0100 |
| commit | 204ed7ff3ee4462bf4c0ffa327683bcaabe13eff (patch) | |
| tree | 06bfee8273236655eb65373e966c38dcfd6d1bbe /us_usgs | |
| parent | 9550eef8af6001ebdce4fe1a1f58a981bba45444 (diff) | |
| download | PROJ-data-204ed7ff3ee4462bf4c0ffa327683bcaabe13eff.tar.gz PROJ-data-204ed7ff3ee4462bf4c0ffa327683bcaabe13eff.zip | |
Add README files
Diffstat (limited to 'us_usgs')
| l--------- | us_usgs/.github/README.md | 1 | ||||
| -rw-r--r-- | us_usgs/README.us_usgs | 41 |
2 files changed, 42 insertions, 0 deletions
diff --git a/us_usgs/.github/README.md b/us_usgs/.github/README.md new file mode 120000 index 0000000..50d9990 --- /dev/null +++ b/us_usgs/.github/README.md @@ -0,0 +1 @@ +../README.us_usgs
\ No newline at end of file diff --git a/us_usgs/README.us_usgs b/us_usgs/README.us_usgs new file mode 100644 index 0000000..6de016e --- /dev/null +++ b/us_usgs/README.us_usgs @@ -0,0 +1,41 @@ +# README.us_usgs + +The files in this section result from the conversion of datasets originating +from USGS + +TODO: Aren't they coming from NOAA instead ? + +## Included grids + +### USA: NAD27 -> NAD83 + +*Source*: USGS +*Format*: GeoTIFF converted from CTable2 +*License*: Public Domain + +* alaska.tif - Alaska +* conus.tif - Conterminous U.S. +* hawaii.tif - Hawaii +* prvi.tif - Puerto Rico, Virgin Is. +* stgeorge.tif - St. George Is, Alaska +* stlrnc.tif - St. Lawrence Is., Alaska +* stpaul.tif - St. Paul Is., Alaska + +### USA: NAD83 -> NAD83 (HARN/HPGN) + +*Source*: USGS +*Format*: GeoTIFF converted from CTable2 +*License*: Public Domain + +Grid data for high precision conversion of geographic coordinates from +the original NAD83 (1986) (EPSG:4269) to NAD83 High Precision Geodetic Networks +(HPGNs) (EPSG:4152), also referred to as High Accuracy Reference Networks (HARNs). +NAD 83 coordinates based on the HPGN/HARN surveys changed approximately 0.2 +to 1.0 meter relative to the original NAD 83 (1986) adjustment. + +* FL.tif - Florida +* MD.tif - Maryland +* TN.tif - Tennessee +* WI.tif - Wisconsin +* WO.tif - Washington, Oregon, N. California + |