Directional Orientation
Map Reading
UTM
Geo-Codes
Map Systems
Map Reading and UTMs
Metric System maps Ontario following a UTM grid 4 Zones apply to Ontario
6 degrees wide, 8 degrees of latitude
Easting and Northing are Longitude and Latitude like coordinates used in UTM
UTM - WHAT IS IT?•Universal Transverse Mercator
• method of map reading
• is universal and used internationally
• no two UTM squares will have the same code
Therefore, ANY LOCATION can be found on a map by having the UTM code.
UTM - WHAT IS IT?
A UTM is a series of lines that form a one square
kilometer grid. The grid is drawn from the south
to the north and from the west to the east. These
lines are called Eastings and Northings.
As most maps used by the Ministry of Health are
gridded as 1 kilometre squares, there are larger
maps which may be gridded to 5 or even 10 km
squares.
UTM - EASTINGThe EASTING is the 3-digit number that is read from the map first. These numbers are located at the bottom or top of the map and are read from left (or west) to right (or east). Remember a top of the map is always north.
Easting
497 498 499 450 451
497 498 499 450 451
1 kmN
UTM - NORTHINGThe Northing is the 4-digit number that is read
from the map last. These numbers are located on
the sides of the map and are read from bottom (or
south) to top (or north).
N5150 5150
5149
5148
5149
5148
5147 5147 Northing
1 km
READING A UTM
497 498 499 450 451
497 498 499 450 451
5150
5149
5148
5147
5150
5149
5148
5147
To obtain a UTM you must always read the Easting number first, then the Northing. Where those two lines meet in the bottom left corner of the square, that 7 digit number will be the UTM.
Example: The blue box below is the location where we must find a UTM.
499 5148
The UTM for everything within the blue box is - 499 5148Easting
Northing
497 498 499 450 451
5150
5149
5148
5147
5150
5149
5148
5147
498 5149
Easting
Northing
READING A UTM
Lets try another example: Find the UTM for the blue dot below
The UTM for everything within the same box is - 498 5149
497 498 499 450 451
MOH - Map Books
At each CACC, GIS has created a series of
large map books. These books show maps
for the entire coverage area for the centre.
Some centres may have more than one
book. Each map is gridded with the UTM.
Ministry of Health
Map Page NumberAdjoining Map Pages
Easting Numbers
Typical MOH Map Page
Reference Grid
Easting line
Northing Numbers
Northing line
Locate the following:Intersection of - LaSalle Bv & Elm St W - 497 5149White Av - 498 5149 & 499 5149Walnut St - 499 5148