GISLatLon

Synopsis

stores a GIS coordinate point as a Latitude/Longitude/Altitude location in Degree/Minute/Second (DMS) form

Input Port

latDegree	double
latMinute	double
latSecond	double
lonDegree	double
lonMinute	double
lonSecond	double
inAlt	double

Output Port

Latitude	double
Longitude	double
Altitude	double

Description

GISLatLon stores a DMS coordinate location and returns the coordinate in decimal degrees. Altitude can be in any units, as long as those units are consistent throughout the GIS network.

Input

latDegree
latMinute
latSecond

Double. Input latitude in DMS format.

lonDegree
lonMinute
lonSecond

Double. Input latitude in DMS format.

inAlt

Double. Input altitude in user units.

Output Port

Latitude
Longitude
Altitude

Double. Output location in decimal degree format.

Latitude Conversions

All DMS Latitude inputs are constrained from -90.0 o (90.0 o S) to 90.0 o (90.0 o N). Values outside of these bounds will be clipped to fall within the -90.0 o to 90.0 o constraints. Cartographers who use N/S latitude notation must map their latitudes to the N = positive, S = negative convention. Conformance with this convention should be observed throughout all GIS related modules.

Longitude Conversions

DMS Longitude inputs are constrained from 0 o (0 o E) to 360 o (0 o W). Values outside of these bounds will be clipped to fall within the 0 o to 360 o constraints. Cartographers who use E/W latitude notation must map their longitudes to the
E = positive, W = negative convention. The GISLatLon module will handle mapping from the +/- convention to the 360 o convention using the following restrictions:

0 o longitude runs through Greenwich, England.

Longitudes run positive in an eastward direction.

0 o E to 180 o E (+180 o ) will be mapped from 0 o to 180 o

180 o W (-180 o ) to 0 o W will be mapped from 180 o to 360 o .

Altitude

Altitude can be represented as any double precision unit of measurement. It is your responsibility to ensure that all units are consistent throughout the network. Negative altitude values are allowed.

Example

Not available

File

v/gis1.v

See also related modules

GISLatLon

GISProjection

GISInverseProj

GISMeshProject

GISMeshInvProject

GISWorldDataBank

GISCIAMapII

GISMapTransform

GISMapDisplay