2TOPOGRAPHIC MAP NOTESDirections: 1. List group member names in a text box on title page.2. Copy notes onto handout to be glued into journal.3. On slides with questions, type answers to questions into the “NOTES” box at the bottom of the slide in “edit view”.Vocabulary to focus on:a. Contour lines e. Hachuresb. Steep slope f. Vc. Gradual slope g. Contour intervald. Sea level h. Index contour4. Answer the questions needing to be answered in the Notes box in “edit” mode
5#2Topographic maps are useful because they represent the three-dimensional image of the land by using lines and symbols.
6Topographic maps show the location and shape of mountains, valleys, plains, streams, wooded areas, roads, buildings, and many other features.
7Topographic maps are graphic representations of the surface of the Earth. They provide:a plan (bird's-eye) view of the landscales to measure ground distancesbearings to indicate directionscoordinate systems to locate featuressymbols for natural and cultural featurescontour lines to show the elevation, slope, and relief of the landscape
8Topographic maps are useful tools for planning highways, recreation areas, airports, housing developments, etc.For you, topographic maps may be useful for recreational activities such as hiking, boating, camping, fishing or hunting.How could you use atopographic map whencamping?
9What is Topography?Topography is the configuration of the land surface, and it is shown on topographic maps with contour lines.Map of ValleysMap of Hills
10TOPOGRAPHIC MAP NOTES CONTOUR LINES lines on your map that show #9TOPOGRAPHIC MAP NOTESCONTOUR LINESlines on your map that showa change in elevation .
11Trace the lines of your layers of the skewer boldly.
17Rules of a Contour line Each contour line represents one elevation. All contour lines eventually connect with themselves.Contour lines never cross each other.Contour lines never split or branch.
18Rules of a Contour line 5. Contour interval: the vertical spacing (the difference inelevation) between 2side by side countourlines.6. Index Contour:Every 5th contour is printed darker called index contoursdark lines markedwith elevations (key).
19Rules of a Contour line V Hachures are short lines used toshow a depression.8. Contour lines that form V’s point upstream whenever they cross streams.
20Points on the map marked "BM" are called Bench Marks. #14Points on the map marked "BM" are called Bench Marks.Bench marks are survey points of known elevation. The exact elevation of a point is given as "BM 60" (for an elevation 60 feet above sea level).Closely spaced contour lines represent steep slopes.Widely spaced contour lines represent gentle slopes.
21#16Remember that streams and rivers flow downhill (from higher elevations to lower elevations).The point of the "V" points uphill or upstream. (Look at map and think about this for a minute.)Note that where a contour line crosses a stream or river (or even a dry gully or valley), the contour lines are bent sharply, forming a "V".
23Closed depressions, such as lakes or canyons, are indicated by contour lines that form roughly a circle, with short "tick marks" or "hachure marks" perpendicular to them on the downhill side.A series of concentric contour lines in a rough circle represents a hill.
39List the elevations for A: ____ B: ____ C: ____ D: ____ E: ___
40Formative Assessment List the elevations for A: ____ B: ____ C: ____ D: ____ E: ___
41An Elevated View In the table on the back of this sheet draw a topographic map illustrating the following landforms in the BEFORE column:A tall mountain (steep)A flat islandA deep canyon (a depression or hole)
42An Elevated View a. the tall mountain is affected by run-off from 2. Draw a topographic map in the AFTER column, predicting what each landform will look like after:a. the tall mountain is affected by run-off frommelting snow caps (snow covering a mountainpeak).b. the flat island is eroded (the movement ofsediment from one location to another) byocean waves.c. the deep canyon is eroded by a swift (fast)-flowing river.
43Landform Before After A tall mountain (Steep) A flat island A deep canyon(depression or hole)
52Contour lines close around _____ or __________. 5.
53Contour lines form V’s that point _________ whenever they cross streams. 6.
54_____________________ The contour interval is the __________________________________________7.
55A contour line is a line on a map that connects points of _______ _______. 8.
56Topographic maps show the changes in _________of the Earth’s surface. 9.
57What is the highest elevation on this map? 10.What is the highest elevation on this map?7525
58Directions: Write your name, date, and period #. Read this passage on mapping erosion control.Write the main idea for each paragraph on the left side of each paragraph.Answer the reading comprehension questions at the end of the passage.