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Index

Component
GpsToolsNET

Class
NmeaParser

Properties
PortEnabled
BaudRate
ComPort
GpsDatum
NoEvents
Parent
AllEventsGeneric
ChecksumMandatory

Events
OnGpsFix
OnSatellites
OnMovement
OnQuality
OnComStatus

Generic
GGA
GLL
RMC

Methods
Dispose
EventInterval
Parse
GetGpsFix
GetSatellites
GetMovement
GetQuality
GetComStatus
WriteData

NmeaParser.GpsDatum GpsTools v1.20 and later

Specifies which datum the GPS is configured to use. As default a GPS uses WGS 84 as datum, but that can be manually changed on some GPS models.

NOTE! GPS models that does not have it's own display, typically models you snap onto your Pocket PC, Bluetooth or connect to the USB port always use WGS_84. In those cases this property doesn't need to be changed.

By default this value is set to WGS_84.

Syntax
object.GpsDatum = Value

Part Type Description
object GpsToolsNET.NmeaParser An object that evaluates to an GpsToolsNET.NmeaParser object.
Value short See below for a list of valid datums.

A datum is a mathematical representation of the earth. A specific position on earth has different latitude/longitude coordinates depending on which datum is used.

If you want more information about datums, read more here.

Value Enum Description
1 WGS_84 Used by the global GPS system. Most GPS-devices has this datum configured as default.
2 ETRS_89 Datum used by many European countries. Very simular to WGS_84. In most cases WGS_84 can be used instead of ETRS_89.
3 OSGB_36 Used in Great Britain.
4 CH_1903_PLUS Used in Switzerland.
5 RT_90 Used in Sweden.
6 IRELAND_65 Used on Ireland.
7 FINLAND_HAYFORD Used in Finland.
8 LUREF Used in Luxembourg.
9 WGS_72 Global geocentric datum.
10 AGD_84 Australian Geodetic Datum.
11 GDA_94 Geodetic Datum of Australia. Almost identical to WGS84.
12 MGI Used in Austria. Aka "Hermannskugel".
13 NZGD_49 New Zealand Geodetic Datum 1949
14 NZGD_2000 New Zealand Geodetic Datum 2000. Almost identical to WGS84
15 NTF Used in France.
16 BD_72 Belgium 1972.
17 ED_50 European Datum 1950. Used in France, Germany, Denmark, etc.
18 DHDN_RAUENBERG Also known as Potsdam. Used in Germany
19 NAD_83 Used in North America.
20 NAD_27_US_ALASKA Used in Alaska
21 NAD_27_US_EAST Used in the U.S.
22 NAD_27_US_CONUS Used in the U.S.
23 NAD_27_US_WEST Used in the U.S.
24 AMERSFOORT Used in the Netherlands.
25 ROME_40 Used in Italy.
26 NGO_48 Used in Norway.
27 ED_50_DENMARK ED50 Denmark (Teknisk Datum 50)
28 CUSTOM_DATUM Custom datum

The Visual Basic constants can be found in 'Samples\Common\modConst.bas'



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