How to use them:
Place the tip of the scale over
the feature you want to find the grid reference for (e.g. the high point 1496m). Make sure the Romer scale lines are parallel to the blue vertical and horizontal grid lines on the map.
Read the numbers off the Romer where the map grid lines intersect the scale.
NOTE: Eastings (vertical grid line numbers) come before Northings (horizontal grid line numbers).
A pneumonic to help remember the order:
You go across the valley (numbers going across the map in an easterly direction) before climbing the hill (numbers going up the map in a northerly direction).
Getting a 6-figure Grid Reference from a GPS
A GPS generates a 14 digit co-ordinate:
For example: 1824628E 5654815N
Delete the first two and last two numbers of the Easting and Northing set. You are left with six numbers which can be used on the map.
The 6-figure map grid reference is: 246548
(see the map below).
Each 7-digit number represent the number of metres from the Geodetic 2000 reference point.
Now you can accurately obtain those elusive 1/10 divisions when generating grid references.Heavy duty transparent laminated plastic sheet. Actual size of the 1:50 000 scale map grid square is 20mm x 20mm which represents 1 square km on a map (2mm line intervals).
Used by Search & Rescue (LandSAR), DOC, Trampers, NZ Mountain Safety Instructors, & Scouts throughout NZ
How to use them - see the diagram below
Cost (NZ prices only) - based on the formula (2.5n + 2) where n is the number of Romers required. All prices include GST and postage.
1 unit costs $4.50
2 units cost $7.00
3 units cost $9.50
4 units cost $12.00
10 units cost $27.00 etc
You'll probably need a few - one for your pack and one for trip planning.
A: 1:50 000 and 1:25 000
B: 1:50 000, 1:40 000, 1:25 000
C: 1:25 000, 1:30 000, 1:40 000 and
D: 1:50 000 and 1:250 000
Other scales can be produced.
How to order:
Please supply your snail mail address, the number of units required and the scales.
An Invoice will be supplied with the Romers. Payment can be made by cheque, or Direct Credit to my bank account (details with the invoice).
Click here to email an order, or to ask a question.