Transcript Lilienthal Map - geo

How to read a Topographic Map
By:
Shauna
Lilienthal
http://libremap.org/data/state/minnesota/place_name_results/
Table of Contents
O Introduction
O What is a topographic map
O Contour and Isolines
O Scale
O Symbols
The map of Mora
O Reading the scale
O Reading symbols
O Township and Range
O What is township and range
O Visual of township and range
O Using township and range
What this power point is
about:
O We will be going through three main parts.
O The first part will be, “what is a topographic
map?” We will explore the big picture as well as
different things to remember about a
topographic map.
O The second part will be the map of Mora. When
we know what a map is, we will point out specific
things on the map of Mora.
O Finally, we will explore township and range and
locate specific places on the map of Mora.
http://www.rollanet.org/~conorw/cwome/hahatonka_topo_map.jpg
A general thing to remember is
that you can tell how steep a
place is by looking at the contour
lines. Lines close together
resemble somewhere that is
steep. Lines farther apart
resemble places that are not so
steep. This arrow is pointing out a
place where there is quite a bit of
space, resembling that that place
is not so steep.
http://mail.colonial.net/~hkaiter/imagextras/topo_map
.jpg
Symbols
O In the following slides are
symbols that you will most
likely see on topographic
maps. Whenever the lines
are represented in this
manner, means that is how
the earth elevations goes.
http://www.nh.nrcs.usda.gov/technical/imag
es/methods/topo1.jpg
Another thing to remember, is that
whenever a line crosses the path of a
river, it automatically points upward.
That shows where valley’s are at. It
makes a “V”.
http://www.csuchico.edu/lbib/maps/MAP3.
GIF
To find out more symbols, you
can find “symbol pages”. Pages
with symbols will differ,
depending on where you find
them at. The previous page was
an example of what some of
them look like.
http://librema
p.org/data/st
ate/minnesot
a/place_name
_results/
Here is a
topographic
map of Mora,
MN.
Taking what we learned, we will look
at specific locations in the map of
Mora. I will point out different areas,
following symbols, lines, ect.
Here is the
scale.
1:24,000
Lake
Marsh
Hill
River
Another thing still yet to mention is Township and
range. The purpose of township and range is to
give land a government setting and a means to
sell land from it. The system by which it is
measured by is from the United States Public
Land Survey. It is divided by the latitude and
longitude line. A square, 6X6 miles long, equals
one township. The range is measured from east
to west.
Below is a drawn example of how a township is measured.
Longitude
Latitude
T1N
T1S
The little orange boxes would keep adding up. You would keep
counting them by T1N, T2N, ect. Then you go from side to side to figure
out the range. The blue box would be T1S RSE.
To make it even more specific, each square is cut off into 1/4ths.
Then you add direction to them. NW ¼. That would mean it is the
top, left corner.
To describe a township, you start from the littlest factors and
mount up to the biggest factors.
EXAMPLE : NW ¼, Section 32, T15, R21W
However, if you wish to find one on a topographic map, you
would follow them backwards: from the largest to the smallest.
On the corners
of topographic
maps are little
red numbers
and letters
showing the
township range
that topographic
maps cover.
34
28
35
36
NEW TOWNSHIP
SAME
TOWNSHIP
Within the
squares are little
red numbers
representing the
numbers as you
move from
square to
square. If the
numbers are in
sequence,
34,35,36, ect
That means it is
the same
townships. When
the numbers
jump you have
moved to a new
range.
We will follow the factors from big to little to see what lies at
SW ¼, S 36, T41N, R24W on the Mora map.
Here are the ranges. We want R. 24W
Now we find T 41N and
follow it to section 36.
Once you find section
36, mentally square
the section off into
four even corners.
Then we would look
to the South-West ¼.
We have found
Hillman Baptist
Church!
And that is how you
read a topographic
map!!
Bibliography :
Media –
http://libremap.org/data/state/minnesota/place_name_results/
http://www.rollanet.org/~conorw/cwome/hahatonka_topo_map.jpg
http://mail.colonial.net/~hkaiter/imagextras/topo_map.jpg
http://www.nh.nrcs.usda.gov/technical/images/methods/topo1.jpg
http://www.csuchico.edu/lbib/maps/MAP3.GIF
Music –
McCreery, Scotty, Water Tower Town. Clear as Day.
Interscope records, 2011.
Information :
Everything written was learned from Professor Knapp’s Physical
Geography