The latest version of the GPS Toolkit, version 3.2, is available for download now. New features include: easier to use UTM conversion functions, miscellaneous GPS functions and more.
You can now download Coordinate Calculator 2.4. This version contains over 4000 map grid, map datum and ellipsoid definitions.
|
Download the Eye4Software GPS Toolkit fully functional 30 day trial version for free |
|
Browse through the Eye4Software GPS Toolkit manual |
UTM stands for Universal Transverse Mercator. It is a Transverse Mercator map projection which can be used at any place on the globe. To cover the whole earth, the system is divided into multiple grids, using 60 zones, each covering 6 degrees which is about 800 kilometers in width.
Each zone is defined for both the northern and southern hemisphere. Therefore the zones are called zone 1N - zone 60N for the northern hemisphere and zone 1S - zone 60S for the southern hemisphere.
This document is going to explain, how you can add support for UTM coordinates to your Visual Basic projects.
The following table describes which UTM zone should be used on any given location on the earth, and its associated UTM parameters:
| Zone | Longitude Range | Hemisphere | False Northing | False Easting | Latitude Origin | Longitude Origin | Scale Factor |
|---|---|---|---|---|---|---|---|
| 1N | 180W - 174W | N | 0 | 500000 | 0 | -177 | 0.9996 |
| 1S | 180W - 174W | S | 10000000 | 500000 | 0 | -177 | 0.9996 |
| 2N | 174W - 168W | N | 0 | 500000 | 0 | -171 | 0.9996 |
| 2S | 174W - 168W | S | 10000000 | 500000 | 0 | -171 | 0.9996 |
| 3N | 168W - 162W | N | 0 | 500000 | 0 | -165 | 0.9996 |
| 3S | 168W - 162W | S | 10000000 | 500000 | 0 | -165 | 0.9996 |
| 4N | 162W - 156W | N | 0 | 500000 | 0 | -159 | 0.9996 |
| 4S | 162W - 156W | S | 10000000 | 500000 | 0 | -159 | 0.9996 |
| 5N | 156W - 150W | N | 0 | 500000 | 0 | -153 | 0.9996 |
| 5S | 156W - 150W | S | 10000000 | 500000 | 0 | -153 | 0.9996 |
| 6N | 150W - 144W | N | 0 | 500000 | 0 | -147 | 0.9996 |
| 6S | 150W - 144W | S | 10000000 | 500000 | 0 | -147 | 0.9996 |
| 7N | 144W - 138W | N | 0 | 500000 | 0 | -141 | 0.9996 |
| 7S | 144W - 138W | S | 10000000 | 500000 | 0 | -141 | 0.9996 |
| 8N | 138W - 132W | N | 0 | 500000 | 0 | -135 | 0.9996 |
| 8S | 138W - 132W | S | 10000000 | 500000 | 0 | -135 | 0.9996 |
| 9N | 132W - 126W | N | 0 | 500000 | 0 | -129 | 0.9996 |
| 9S | 132W - 126W | S | 10000000 | 500000 | 0 | -129 | 0.9996 |
| 10N | 126W - 120W | N | 0 | 500000 | 0 | -123 | 0.9996 |
| 10S | 126W - 120W | S | 10000000 | 500000 | 0 | -123 | 0.9996 |
| 11N | 120W - 114W | N | 0 | 500000 | 0 | -117 | 0.9996 |
| 11S | 120W - 114W | S | 10000000 | 500000 | 0 | -117 | 0.9996 |
| 12N | 114W - 108W | N | 0 | 500000 | 0 | -111 | 0.9996 |
| 12S | 114W - 108W | S | 10000000 | 500000 | 0 | -111 | 0.9996 |
| 13N | 108W - 102W | N | 0 | 500000 | 0 | -105 | 0.9996 |
| 13S | 108W - 102W | S | 10000000 | 500000 | 0 | -105 | 0.9996 |
| 14N | 102W - 096W | N | 0 | 500000 | 0 | -99 | 0.9996 |
| 14S | 102W - 096W | S | 10000000 | 500000 | 0 | -99 | 0.9996 |
| 15N | 096W - 090W | N | 0 | 500000 | 0 | -93 | 0.9996 |
| 15S | 096W - 090W | S | 10000000 | 500000 | 0 | -93 | 0.9996 |
| 16N | 090W - 084W | N | 0 | 500000 | 0 | -87 | 0.9996 |
| 16S | 090W - 084W | S | 10000000 | 500000 | 0 | -87 | 0.9996 |
| 17N | 084W - 078W | N | 0 | 500000 | 0 | -81 | 0.9996 |
| 17S | 084W - 078W | S | 10000000 | 500000 | 0 | -81 | 0.9996 |
| 18N | 078W - 072W | N | 0 | 500000 | 0 | -75 | 0.9996 |
| 18S | 078W - 072W | S | 10000000 | 500000 | 0 | -75 | 0.9996 |
| 19N | 072W - 066W | N | 0 | 500000 | 0 | -69 | 0.9996 |
| 19S | 072W - 066W | S | 10000000 | 500000 | 0 | -69 | 0.9996 |
| 20N | 066W - 060W | N | 0 | 500000 | 0 | -63 | 0.9996 |
| 20S | 066W - 060W | S | 10000000 | 500000 | 0 | -63 | 0.9996 |
| 21N | 060W - 054W | N | 0 | 500000 | 0 | -57 | 0.9996 |
| 21S | 060W - 054W | S | 10000000 | 500000 | 0 | -57 | 0.9996 |
| 22N | 504W - 048W | N | 0 | 500000 | 0 | -51 | 0.9996 |
| 22S | 054W - 048W | S | 10000000 | 500000 | 0 | -51 | 0.9996 |
| 23N | 048W - 042W | N | 0 | 500000 | 0 | -45 | 0.9996 |
| 23S | 048W - 042W | S | 10000000 | 500000 | 0 | -45 | 0.9996 |
| 24N | 042W - 036W | N | 0 | 500000 | 0 | -39 | 0.9996 |
| 24S | 042W - 036W | S | 10000000 | 500000 | 0 | -39 | 0.9996 |
| 25N | 036W - 030W | N | 0 | 500000 | 0 | -33 | 0.9996 |
| 25S | 036W - 030W | S | 10000000 | 500000 | 0 | -33 | 0.9996 |
| 26N | 030W - 024W | N | 0 | 500000 | 0 | -27 | 0.9996 |
| 26S | 030W - 024W | S | 10000000 | 500000 | 0 | -27 | 0.9996 |
| 27N | 024W - 018W | N | 0 | 500000 | 0 | -21 | 0.9996 |
| 27S | 024W - 018W | S | 10000000 | 500000 | 0 | -21 | 0.9996 |
| 28N | 018W - 012W | N | 0 | 500000 | 0 | -15 | 0.9996 |
| 28S | 018W - 012W | S | 10000000 | 500000 | 0 | -15 | 0.9996 |
| 29N | 012W - 006W | N | 0 | 500000 | 0 | -9 | 0.9996 |
| 29S | 012W - 006W | S | 10000000 | 500000 | 0 | -9 | 0.9996 |
| 30N | 006W - 000W | N | 0 | 500000 | 0 | -3 | 0.9996 |
| 30S | 006W - 000W | S | 10000000 | 500000 | 0 | -3 | 0.9996 |
| 31N | 000E - 006E | N | 0 | 500000 | 0 | 3 | 0.9996 |
| 31S | 000E - 006E | S | 10000000 | 500000 | 0 | 3 | 0.9996 |
| 32N | 006E - 012E | N | 0 | 500000 | 0 | 9 | 0.9996 |
| 32S | 006E - 012E | S | 10000000 | 500000 | 0 | 9 | 0.9996 |
| 33N | 012E - 018E | N | 0 | 500000 | 0 | 15 | 0.9996 |
| 33S | 012E - 018E | S | 10000000 | 500000 | 0 | 15 | 0.9996 |
| 34N | 018E - 024E | N | 0 | 500000 | 0 | 21 | 0.9996 |
| 34S | 018E - 024E | S | 10000000 | 500000 | 0 | 21 | 0.9996 |
| 35N | 024E - 030E | N | 0 | 500000 | 0 | 27 | 0.9996 |
| 35S | 024E - 030E | S | 10000000 | 500000 | 0 | 27 | 0.9996 |
| 36N | 030E - 036E | N | 0 | 500000 | 0 | 33 | 0.9996 |
| 36S | 030E - 036E | S | 10000000 | 500000 | 0 | 33 | 0.9996 |
| 37N | 036E - 042E | N | 0 | 500000 | 0 | 39 | 0.9996 |
| 37S | 036E - 042E | S | 10000000 | 500000 | 0 | 39 | 0.9996 |
| 38N | 042E - 048E | N | 0 | 500000 | 0 | 45 | 0.9996 |
| 38S | 042E - 048E | S | 10000000 | 500000 | 0 | 45 | 0.9996 |
| 39N | 048E - 054E | N | 0 | 500000 | 0 | 51 | 0.9996 |
| 39S | 048E - 054E | S | 10000000 | 500000 | 0 | 51 | 0.9996 |
| 40N | 054E - 060E | N | 0 | 500000 | 0 | 57 | 0.9996 |
| 40S | 054E - 060E | S | 10000000 | 500000 | 0 | 57 | 0.9996 |
| 41N | 060E - 066E | N | 0 | 500000 | 0 | 63 | 0.9996 |
| 41S | 060E - 066E | S | 10000000 | 500000 | 0 | 63 | 0.9996 |
| 42N | 066E - 072E | N | 0 | 500000 | 0 | 69 | 0.9996 |
| 42S | 066E - 072E | S | 10000000 | 500000 | 0 | 69 | 0.9996 |
| 43N | 072E - 078E | N | 0 | 500000 | 0 | 75 | 0.9996 |
| 43S | 072E - 078E | S | 10000000 | 500000 | 0 | 75 | 0.9996 |
| 44N | 078E - 084E | N | 0 | 500000 | 0 | 81 | 0.9996 |
| 44S | 078E - 084E | S | 10000000 | 500000 | 0 | 81 | 0.9996 |
| 45N | 084E - 090E | N | 0 | 500000 | 0 | 87 | 0.9996 |
| 45S | 084E - 090E | S | 10000000 | 500000 | 0 | 87 | 0.9996 |
| 46N | 090E - 096E | N | 0 | 500000 | 0 | 93 | 0.9996 |
| 46S | 090E - 096E | S | 10000000 | 500000 | 0 | 93 | 0.9996 |
| 47N | 096E - 102E | N | 0 | 500000 | 0 | 99 | 0.9996 |
| 47S | 096E - 102E | S | 10000000 | 500000 | 0 | 99 | 0.9996 |
| 48N | 102E - 108E | N | 0 | 500000 | 0 | 105 | 0.9996 |
| 48S | 102E - 108E | S | 10000000 | 500000 | 0 | 105 | 0.9996 |
| 49N | 108E - 114E | N | 0 | 500000 | 0 | 111 | 0.9996 |
| 49S | 108E - 114E | S | 10000000 | 500000 | 0 | 111 | 0.9996 |
| 50N | 114E - 120E | N | 0 | 500000 | 0 | 117 | 0.9996 |
| 50S | 114E - 120E | S | 10000000 | 500000 | 0 | 117 | 0.9996 |
| 51N | 120E - 126E | N | 0 | 500000 | 0 | 123 | 0.9996 |
| 51S | 120E - 126E | S | 10000000 | 500000 | 0 | 123 | 0.9996 |
| 52N | 126E - 132E | N | 0 | 500000 | 0 | 129 | 0.9996 |
| 52S | 126E - 132E | S | 10000000 | 500000 | 0 | 129 | 0.9996 |
| 53N | 132E - 138E | N | 0 | 500000 | 0 | 135 | 0.9996 |
| 53S | 132E - 138E | S | 10000000 | 500000 | 0 | 135 | 0.9996 |
| 54N | 138E - 144E | N | 0 | 500000 | 0 | 141 | 0.9996 |
| 54S | 138E - 144E | S | 10000000 | 500000 | 0 | 141 | 0.9996 |
| 55N | 144E - 150E | N | 0 | 500000 | 0 | 147 | 0.9996 |
| 55S | 144E - 150E | S | 10000000 | 500000 | 0 | 147 | 0.9996 |
| 56N | 150E - 156E | N | 0 | 500000 | 0 | 153 | 0.9996 |
| 56S | 150E - 156E | S | 10000000 | 500000 | 0 | 153 | 0.9996 |
| 57N | 156E - 162E | N | 0 | 500000 | 0 | 159 | 0.9996 |
| 57S | 156E - 162E | S | 10000000 | 500000 | 0 | 159 | 0.9996 |
| 58N | 162E - 168E | N | 0 | 500000 | 0 | 165 | 0.9996 |
| 58S | 162E - 168E | S | 10000000 | 500000 | 0 | 165 | 0.9996 |
| 59N | 168E - 174E | N | 0 | 500000 | 0 | 171 | 0.9996 |
| 59S | 168E - 174E | S | 10000000 | 500000 | 0 | 171 | 0.9996 |
| 60N | 174E - 180E | N | 0 | 500000 | 0 | 177 | 0.9996 |
| 60S | 174E - 180E | S | 10000000 | 500000 | 0 | 177 | 0.9996 |
The Eye4Software GPS toolkit is a GPS SDK (Software Developers Kit) which allows software developers to add GPS functionality to their own programs and scripts with just a few lines of extra code. The SDK offers functionality to read position, speed, heading and more, from a connected GPS using the NMEA 0183 protocol. It can also be used to add support for map projections to your software. Supported map projections include: Transverse Mercator, Oblique Mercator, Lambert Conformal Conic, Stereographic, Albers Equal Area, Polar Stereographic, Mercator, PolyConic, Mollweide, Eckert, Krovak, Cassini and more.
The product can be used in many programming environments, such as Visual Basic, Visual C++, Visual C# .NET, Visual Basic .NET, Borland C++ Builder, Borland Delphi and VBA, but also web oriented applications such as ASP, ASP .NET and PHP, and all other programming environments that support ActiveX.
First you must have Visual Basic and the Eye4Software GPS Component installed on your computer. We will use Visual Basic 6.0 in this document, but other versions from 6.0 and up can be used. You can download the Eye4Software GPS Component here.
Start the Visual Basic IDE, and select the "New Project" option from the "File" menu. The "New Project" dialog now appears, select the "Standard EXE" option to generate a Windows GUI application.
In order to declare and create the objects from your Visual Basic application, you need to add a reference to the ActiveX object, by choosing the "References" option from the "Project" menu. A list of components installed on the system is displayed. Just check the checkbox in front of the "Eye4Software GPS Toolkit 3.0" and click "OK".
After adding the reference to the control, you can declare the objects like this:
Private objProjection As GpsProjection Private objDatum As GpsDatumParameters
The objects can be created in your code by double clicking on the Form you created, this will open the Form_Load handler. Paste the following code in this function:
Set objProjection = CreateObject ("Eye4Software.GpsProjection")
Set objDatum = CreateObject ("Eye4Software.GpsDatumParameters")
The source code below demonstrates how to add latitude / longitude to UTM transformation functionality to your program using the GPS Toolkit. In this example a position is transformed from WGS84 latitude / longitude to UTM WGS84. Using the 'ToUTM' function, the software will automatically calculate the UTM zone for the given position. To perform a inverse calculation use the 'FromUTM' function.
Option Explicit
'/////////////////////////////////////////////////////////////////////////
Private objProjection As GpsProjection
Private objDatum As GpsDatumParameters
'/////////////////////////////////////////////////////////////////////////
Private Sub CommandTranslate_Click()
' Set Datum ( WGS84 )
' The ID for WGS84 is 4326, see 'http://www.eye4software.com/resources/datums' for a full list of supported datums
' To use UTM with another map datum, just change the code below (EPSG code)
objDatum.LoadFromId(4326)
' Set Source coordinates
objProjection.Latitude = CDbl(TextLatitude.Text)
objProjection.Longitude = CDbl(TextLongitude.Text)
' Perform the datum transformation
objProjection.ToUTM objDatum
' Display the result
TextNorthing.Text = objProjection.Northing
TextEasting.Text = objProjection.Easting
End Sub
'/////////////////////////////////////////////////////////////////////////
Private Sub Form_Load()
' Create the objects
Set objProjection = CreateObject("Eye4Software.GpsProjection")
Set objDatum = CreateObject("Eye4Software.GpsDatumParameters")
' Set default values for input boxes
TextLatitude.Text = "54.66"
TextLongitude.Text = "-6.81"
End Sub
'/////////////////////////////////////////////////////////////////////////