NGS Coordinate Conversion and Transformation Tool (NCAT)
Release Details
The NGS Coordinate Conversion and Transformation Tool (NCAT) is now available for public use. NCAT incorporates several previously separate transformation tools into a single browser-based user interface and also supports single-point and multi-point conversions, Web services, and downloadable software.
Product Features
Coordinate Conversions
NCAT incorporates the capabilities of the following NGS computer programs, originally stand-alone software products.
XYZ Coordinate Conversion (XYZWIN 2.0)
Universal Transverse Mercator Coordinates (UTMS 2.1)
State Plane Coordinates, NAD 83 (SPC83 2.1)
State Plane Coordinates, NAD 27 (GPPCGP 2.0)
U.S. National Grid (USNG 2.3)
Datum Transformations
NCAT also incorporates the capabilities of NADCON 5.0, which performs three-dimensional (latitude, longitude, ellipsoid height) coordinate transformations for a wide range of datums and regions in the National Spatial Reference System. NADCON 5.0 is the replacement for all previous versions of the following tools:
NADCON, which transformed coordinates between the North American Datum of 1927 (NAD 27) and early realizations of the North American Datum of 1983 (NAD 83), and
GEOCON, which transformed coordinates between various latter realizations of NAD 83.
https://geodesy.noaa.gov/NCAT/?utm_medium=email&utm_source=GovDelivery
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Is there a similar tool by NGS or others that
- runs stand-alone on a laptop or phone, where there is no internet access
- does not require a Java run-time, due to security and licensing issues
- does not require a US government PKI digital certificate, as some solutions from the National Geospacial-Intelligence Agency do
- supports United States National Grid, which I encountered a few weeks ago at an exercise with the Vermont Urban Search and Rescue team.
My application would be search & rescue. If you get close enough to find a person in the bushes, that's certainly close enough. So the distinction between various realizations of WGS-84 and NAD83 are not important (and NAD27 can probably be ignored in this context).
What exactly is the input and output type desired?
DNRGPS may do what you want. See page 98 at this site for the link: http://www.mapsar.net/files/gis-for-wildland-search-and-rescue-ebook.pdf
Hope it works for you.
The input medium is the screen of a GPS device in the hand of a ground searcher, or in the cockpit of a single-engine aircraft, or a position that has been transmitted by voice radio to an emergency operations center and written on a paper message form.
The output medium may be a paper message form, hand plotting onto a paper map, or human input with a keypad into a GPS device or computer.
The message format may be
- decimal degrees (Always north latitude; longitude will be west or negative; expressing the longitude of Grand Central Terminal in New York as 286.0229° would be rare.)
- degrees & decimal minutes,
- degrees, minutes, and seconds (Decimal fractions of a second would be unusual, and at most one place after the decimal point would be valid.)
- UTM
- US National Grid
Any of the listed formats could occur as input, and could be required as output.
