Lab Quiz #1 Flashcards
What is a topographic map?
A detailed graphic representation of features that appear on the Earth’s surface
How is terrain represented on topographic maps?
Contour lines
What are the 2 main purposes topographic maps have in archaeology?
Location of sites and Environmental assessment of a region
Map Reference
A number and a title indicating which map in the series one is working with
Generally located near the corner of a map
Date of Publication
Should always check date of original geographical survey and publication of map
allows you to reference map and check that you’re using recent representation of terrain and environment
How many north arrows on topographic maps?
3
True North
Fixed geographical north point (the North Pole) on Earth
arrow with star
Magnetic North
Point on Earth where magnetic lines of force converge, and consequently where a magnetic compass points
Traditionally has been in the North of Canada near Ellesmere Island, but is moving towards Russia
Arrow with MN
Grid North
Follows orientation of Universal Transverse Mercator system
Arrow with GN
Magnetic Declination
Angle between True North and Magnetic North
Used to calibrate compasses
When is True and Magnetic North in 0 degrees?
When they’re in the same direction
When is True and Magnetic North positive?
When magnetic north is east of true north
When is True and Magnetic North negative?
When magnetic north is west of true north
Angle between True North and Grid North
Grid Declination
What do contour lines represent?
The elevations of points on the ground
Illustrate the shape of the land surface
Can be negative or positive
The number and horizontal separation between contour lines
A reflection of steepness of a slope
Every 5th line in a contour lines is what?
An Index contour
What are location systems?
The methods by which locations of things are recorded
3 most widely used location systems in Canada?
- Legal Description
- Geographic Systems
- Universal Transverse Mercator System
Meridians - Legal System
North/South lines
Baselines - Legal Systems
East/West lines
First baseline is on US/Canada border
Each subsequent baseline is about 39km (24 miles) north of the previous
Where are townships
At each intersection of a baseline and meridian
Townships
About 6x6 miles square
Every township is divided into 36 sections
How big are the 36 sections
1 mile square
Sections are divided into
4 quarters
sections of SE, SW, NE, NW
Which one represents Meridian - 5-1-87-18W4
W4
In Western Canada, land is identified as being west of a Meridian
Which one represents Range - 5-1-87-18W4
18