PathAway version 3

Draft 2

Advanced Mapping Manual

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Last Updated: July 2, 2003

Table of Contents

Getting Started
  Calibrating Maps
Map Projections
Map Datums
Map Conversion Tools


PathAway Map Manager
PathAway Map Conversion SDK

Special Cases
  Calibrating OSGB Maps


Getting Started

Coming Soon.


Coming Soon


Map Projection Descriptions

Map Datums Descriptions (coming soon)


Calibrate Maps

Coming Soon


Map Projections

Map projections are attempts to portray the surface of the earth or a portion of the earth on a flat surface. Some distortions of conformality, distance, direction, scale, and area always result from this process. Some projections minimize distortions in some of these properties at the expense of maximizing errors in others. Some projection are attempts to only moderately distort all of these properties.

See Map Projection Descriptions for more definitions of supported projections and parameters of use.

Supported Projections

About Projections

PathAway 3.0 supports Map projections through the ProjLib shared library. This library is based on the publicly available projection library PROJ4. The projection parameters required in Proj4 apply to PathAway3 and must be included in the Calibration command for Projection. Note Touratech-QV does this automatically when you convert a projected map to PathAway.

PathAway supports only projections with Forward and Inverse projection capabilities.

(more to come)

Projection ID Description RELEASE STATUS
aea Albers Equal Area  
aeqd Azimuthal Equidistant  
aitoff Aitoff  
alsk Mod. Stererographics of Alaska  
apian Apian Globular I  
bipc Bipolar conic of western hemisphere  
bonne Bonne (Werner lat_1=90)  
cass Cassini  
cc Central Cylindrical  
cea Equal Area Cylindrical  
collg Collignon  
crast Craster Parabolic (Putnins P4)  
eck1 Eckert I  
eck2 Eckert II  
eck3 Eckert III  
eck4 Eckert IV  
eck5 Eckert V  
eck6 Eckert VI  
eqc Equidistant Cylindrical (Plate Caree)  
eqdc Equidistant Conic  
euler Euler  
fahey Fahey  
fouc Foucaut  
fouc_s Foucaut Sinusoidal  
gall Gall (Gall Stereographic)  
gins8 Ginsburg VIII (TsNIIGAiK)  
gn_sinu General Sinusoidal Series  
gnom Gnomonic  
goode Goode Homolosine  
gs48 Mod. Stererographics of 48 U.S.  
gs50 Mod. Stererographics of 50 U.S.  
hatano Hatano Asymmetrical Equal Area  
imw_p Internation Map of the World Polyconic  
kav5 Kavraisky V  
kav7 Kavraisky VII  
labrd Laborde  
laea Lambert Azimuthal Equal Area  
latlong Lat/long (Geodetic) ProjLib.prc
lcc Lambert Conformal Conic ProjLib.prc
leac Lambert Equal Area Conic  
lee_os Lee Oblated Stereographic  
loxim Loximuthal  
lsat Space oblique for LANDSAT  
mbt_s McBryde-Thomas Flat-Polar Sine  
mbt_fps McBryde-Thomas Flat-Pole Sine (No. 2)  
mbtfpp McBride-Thomas Flat-Polar Parabolic  
mbtfpq McBryde-Thomas Flat-Polar Quartic  
mbtfps McBryde-Thomas Flat-Polar Sinusoidal  
merc Mercator  
mil_os Miller Oblated Stereographic  
mill Miller Cylindrical  
mpoly Modified Polyconic  
moll Mollweide  
murd1 Murdoch I  
murd2 Murdoch II  
murd3 Murdoch III  
nell Nell  
nell_h Nell-Hammer  
nsper Near-sided perspective  
nzmg New Zealand Map Grid  
ob_tran General Oblique Transformation  
ocea Oblique Cylindrical Equal Area  
oea Oblated Equal Area  
omerc Oblique Mercator  
ortel Ortelius Oval  
ortho Orthographic  
pconic Perspective Conic  
poly Polyconic (American)  
putp1 Putnins P1  
putp2 Putnins P2  
putp3 Putnins P3  
putp3p Putnins P3'  
putp4p Putnins P4'  
putp5 Putnins P5  
putp5p Putnins P5'  
putp6 Putnins P6  
putp6p Putnins P6'  
qua_aut Quartic Authalic  
robin Robinson  
rpoly Rectangular Polyconic  
sinu Sinusoidal (Sanson-Flamsteed)  
somerc Swiss. Obl. Mercator  
stere Stereographic  
tcea Transverse Cylindrical Equal Area  
tissot Tissot Conic  
tmerc Transverse Mercator PJtmerc.prc
tpeqd Two Point Equidistant  
tpers Tilted perspective  
ups Universal Polar Stereographic  
urmfps Urmaev Flat-Polar Sinusoidal  
utm Universal Transverse Mercator (UTM) PJtmerc.prc
vandg van der Grinten I  
vandg3 van der Grinten III  
vitk1 Vitkovsky I  
wag1 Wagner I (Kavraisky VI)  
wag2 Wagner II  
wag3 Wagner III  
wag4 Wagner IV  
wag5 Wagner V  
wag6 Wagner VI  
weren Werenskiold I  
wintri Winkel Tripel  

Map Datums

Supported Datum Grids

Datum ID Ellipisoid Description
AustNataust_SAAustralian National
AustriabesselAustria NS
AGD66aust_SAAustralian Geod 66
AGD84aust_SAAustralian Geod 84
Eur1950intlEuropean 1950
Eur1979intlEuropean 1979
GDA94GRS80Australian Geod 94
GGRS87GRS80Greek Geodetic Ref 1987
HKong63intlHong Kong 1963
Irelnd65mod_airyIreland 1965
NAD27Alaskaclrk66N American Datum 1927 - Alaska
NAD27Bahamasclrk66N American Datum 1927 - Bahamas
NAD27Canadaclrk66N American Datum 1927 - Canada
NAD27CanalZnclrk66N American Datum 1927 - Canal Zone
NAD27Caribbnclrk66N American Datum 1927 - Caribbean
NAD27Centclrk66N American Datum 1927 - Central
NAD27CONUSclrk66N American Datum 1927 - ConUS
NAD27Cubaclrk66N American Datum 1927 - Cuba
NAD27Grnlandclrk66N American Datum 1927 - Greenland
NAD27Mexicoclrk66N American Datum 1927 - Mexico
NAD27SanSalclrk66N American Datum 1927 - San Salvador
NeTri21besselNetherland Tri 21
NTrFranceclrk80Nou Triag France
NTrLuxintlNou Triag Luxembourg
OrdSrvyGrtBritnairyOrd Srvy Grt Britn
Portug73intlPortuguese 1973
ProvSAm56intlProv South American 56
ProvSChln63intlProv South Chilean 63
PuertoRicoclrk66Puerto Rico
Pulkovo1942krassPulkovo 1942
Rome40intlROMA 1940
SoAm69SAm1969South American 69
SoAsiafschr60mSouth Asia
SEBaseintlSoutheast Base
SWBaseintlSouthwest Base

Supported Ellipisoids

Ellipisoid ID Description  
SGS85 Soviet Geodetic System 85  
GRS80 GRS 1980(IUGG, 1980)  
IAU76 IAU 1976  
airy Airy 1830  
APL4.9 Appl. Physics. 1965  
NWL9D Naval Weapons Lab., 1965  
mod_airy Modified Airy  
andrae Andrae 1876 (Den., Iclnd.)  
aust_SA Australian Natl & S. Amer. 1969  
GRS67 GRS 67(IUGG 1967)  
bessel Bessel 1841  
bess_nam Bessel 1841 (Namibia)  
clrk66 Clarke 1866  
clrk80 Clarke 1880 mod.  
CPM Comm. des Poids et Mesures 1799  
delmbr Delambre 1810 (Belgium)  
engelis Engelis 1985  
evrst30 Everest 1830  
evrst48 Everest 1948  
evrst56 Everest 1956  
evrst69 Everest 1969  
evrstSS Everest (Sabah & Sarawak)  
fschr60 Fischer (Mercury Datum) 1960  
fschr60m Modified Fischer 1960  
fschr68 Fischer 1968  
helmert Helmert 1906  
hough Hough  
intl International 1909 (Hayford)  
krass Krassovsky 1942  
kaula Kaula 1961  
lerch Lerch 1979  
mprts Maupertius 1738  
new_intl New International 1967  
plessis Plessis 1817 (France)  
SAm1969 South American 1969  
SEasia Southeast Asia  
walbeck Walbeck  
WGS60 WGS 60  
WGS66 WGS 66  
WGS72 WGS 72  
WGS84 WGS 84  
sphere Normal Sphere (r=6370997)  

Map Conversion Tools

PathAway Map Manager

Use the Map Manager to prepare maps for PathAway. The application is quite simple and straight forward. To prepare a map follow these steps:

1. Ensure the map is in either Jpeg or BMP format.

2. Run the PathAway Map Manager.

3. To import a map, choose from the menu Map-Import Map. Select your map from the dialog.

4. Next, give the map a name, and set its color depth. The color depth must at least match your device's. Most Handheld devices support color depths that are equal to or less than the maximum available on the device. I.e. if your device supports up to 256 colors, then, 4-bit gray-scale maps will work.

5. The next step is to Calibrate your map's geographic coordinates so it can be used for GPS Navigation. To set the calibration for the map, click on the Calibrate button on the top panel of the Map Window. The Calibration panel will appear.

NOTE: if you're not sure of the map's coordinates, you can calibrate the map later in PathAway based on captured GPS points. (See the PathAway manual section on Calibrating Maps ).

Calibrating Maps in PathAway Map Manager

The simplest form of calibration is a map defined by Top-Left and Bottom-Right coordinates. You can enter the longitude and latitude coordinates of each corner of the map. You can also calibrate a map by its known Projection parameters. The 3x3 calibration option is used by Touratech-QV to perpare maps for PathAway.

Calibrate by Top-Left and Bottom-Right Points

First choose the "Calibrate

The position coordinates can be specified by one of the following methods:

1) By top-left and bottom right or,

2) By the map center coordinates, and the total distance covered by the map. Total distance is in statute miles. To convert from nautical miles to statute miles, multiply nautical miles by 1.151. For Kilometers to Miles, multiply kilometers by 0.621

3) By the known longitude and latitude coordinates of known points on the map. With this method, you can set up to 9 points on the map to calibrate on. For each point, you can click on it's position on the map and enter it's geographic coordinates. Once you have entered all of the points, click Apply, and the top-left and bottom-right corrds of the map will be calculated.

When you're done setting up the map, save the map by selecting File-Save Map As. You will be prompted to save it with a .prc extension. You can also send the map directly to your Handheld using the File-Send To command.


QuoVadis is a powerful PC-Desktop GPS solution that now integrates support for creating, viewing, and editting PathAway Maps, Routes, Tracks, and Points. QuoVadis also sells maps for locations all over the world.

The combination of QuoVadis and PathAway provides you with a complete navigation solution. Acquire and prepare all your maps, create your routes, and edit your points, in QuoVadis. Then, transfer the data to PathAway to take with you on the road. Once you return from your trip, import all your the new recorded tracks, and points back into QuoVadis for easy viewing, and editting.

See for more information.

PathAway Map Conversion SDK

PathAway Data Conversion tools allow advanced users and developers to convert maps to PathAway format, and to convert routes, tracks, and waypoints to and from PathAway format. The Data conversion tools are currently in the form of Command Line batch programs, and Windows DLL format.

See the PathAway Data Conversion Tools page to download the tools, and get detailed information.

Special Cases

Calibrating OSGB Maps

Most OSGB maps have horizontal and vertical OSGB Grid lines. PathAway Rectangular Calibration requires Longitude/Latitude lines to be horizontal/vertical. If this is the case for your OSGB map, you will need to either rotate the map so the Long/Lat lines are rectangular, or you will need to use a Projected map to Calibrate correctly. To calibrate OSGB maps such as this you can use the following projection parameters:

Calibration Type: Projection
Datum: OSGB
Projection: Transverse Mercator
lon_0: W2.000
lat_0: N49.00
x_0: 400000
y_0: -100000

Use at least 2 known points for the calibration points.



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