Converting Latitude & Longitude to Easting and Northing using CoordCon in Terramodel


Step 1 Import Latitude, Longitude & Height points data into Terramodel. If the data is already in Terramodel, skip straight to Step 5.

From the main menu, select File / Download Import / ASCII pts

Step 2 Select a PTS or data file

Step 3 Change the data order to n,e,z if the file has Latitude, Longitude, Height as below.
   Note: 
Latitude, Longitude  must be in decimal degrees (DDD.dddddd)
size=2>View File Contents Form

Step 4 Set the displayed precision of the coordinates to check values.
menu / Settings / Unit Settings / Precision as below.

Displayed Precision Settings Form

You can then use Coordcon to convert the points to Eastings and Northings.

Step 5 From the main menu select Cogo / Utilities / Coordinate conversion or type coordcon in the Terramodel command line then press enter.

 

Step 6 Click the [Coordinate systems] button

Step 7 Change the From system to LL-360 as above.  This is a generic format for Latitudes and Longitudes in decimal degrees.  Longitudes are east values only in the range 0 to 360 degrees.   

In this example we will assume the Lats/Longs are on the AGD66 defined spheroid and the required Coordinate System is AMG66 ZONE 55.

Step 8 Change the To system to AMG66 Zone 66 as above, then click the [Ok] button.  

Note: If the Coordinate System has not been defined, see Creating a new Coordinate System in Terramodel.

Step 9 Click the [Multiple points] button then use the selection tools to select the points to be converted.

Step 10 A list of the conversions (as below) may be produced by clicking the [List] button.


Coordinate Conversion Report


Input CS: Generic Lat/Long's, Degrees, 0 ==> +360
Output CS: AMG66 ZONE 55 WRT GDA94
Input Units Assumed: DEGREE
Output Units Assumed: METER

Point  Latitude       Longitude               North        East
1 -32 03'10.2339" 145 44'22.0964" ==>> 6453000.0000 381000.0000
2 -32 03'15.2227" 145 44'10.0138" ==>> 6452842.6730 380684.9260
3 -32 03'15.2227" 145 44'10.0138" ==>> 6452842.6730 380684.9260
4 -32 03'15.2358" 145 44'10.0308" ==>> 6452842.2730 380685.3780
5 -32 03'15.2460" 145 44'10.0438" ==>> 6452841.9650 380685.7220
6 -32 03'15.2889" 145 44'10.0992" ==>> 6452840.6610 380687.1890
:


Step 11 Click the [Convert] button to convert the coordinates in Terramodel. 

Step 12 Confirm a value (eg Point 1) using GeoCalc as below.


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