1 / 9

Topographic Maps

Topographic Maps. TOPOGRAPHIC MAP. A MAP WHICH SHOWS ELEVATION OF THE LAND WITH THE USE OF CONTOUR LINES, SHAPES , AND SYMBOLS. CONTOUR LINES. LINES DRAWN TO CONNECT POINTS OF THE SAME ELEVATION. THREE THINGS CONTOUR LINES SHOW US. ELEVATION.

yuli-ramos
Télécharger la présentation

Topographic Maps

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Topographic Maps

  2. TOPOGRAPHIC MAP A MAP WHICH SHOWS ELEVATION OF THE LAND WITH THE USE OF CONTOUR LINES, SHAPES , AND SYMBOLS CONTOUR LINES LINES DRAWN TO CONNECT POINTS OF THE SAME ELEVATION

  3. THREE THINGS CONTOUR LINES SHOW US ELEVATION CONTOUR INTERVAL- THE DIFFERENCE IN ELEVATION BETWEEN TWO CONSECUTIVE CONTOUR LINES INDEX CONTOUR- EVERY FOURTH OR FIFTH LINE WHICH IS DARKENED FOR EASY READING

  4. STEEPNESS OF SLOPES CLOSER CONTOUR LINES = STEEP SLOPES WELL-SPACED CONTOUR LINES = FLATTER, GENTLE SLOPES THE SHAPE OF THE LAND AT VARIOUS HEIGHTS

  5. ELEVATIONS OF LAND BELOW SEA LEVEL ( SINKHOLE, QUARRY, MINE) MEASURED USING A HACHURE LINE THE “WHISKERS” POINT TO THE LOWER ELEVATION **FIRST DEPRESSION LINE TAKES THE VALUE OF THE CONTOUR LINE SURROUNDING IT

  6. INFORMATION LEARNED FROM A TOPOGRAPHIC MAP A BENCHMARK POINT IS A LOCATION WHOSE EXACT ELEVATION IS KNOWN AND IS NOTED ON A BRASS ALLUMINUM PLATE ( BM )

  7. A  MAXIMUM ELEVATION- HIGHEST POSSIBLE ELEVATION FIGURE OUT WHAT THE NEXT POSSIBLE CONTOUR LINE WOULD BE THEN SUBTRACT 1 UNIT MINIMUM ELEVATION- LOWEST POSSIBLE ELEVATION THE NEXT POSSIBLE DEPRESSION LINE, THEN PLUS 1 UNIT

  8. RIVERS CUT A VALLEY AND CAUSE CONTOUR LINES TO FORM A V-SHAPE POINTING TO THE SOURCE OF THE STREAM (UPSTREAM). GRADIENT = CHANGE IN ELEVATION (ft) DISTANCE (mi)

  9. PROFILE- SIDE VIEW OF THE SHAPE OF THE LAND ON A TOPOGRAPHIC MAP RELIEF- DIFFERENCE IN ELEVATION RELIEF MAP – RAISED MAP WHICH SHOWS DIFFERENCE IN ELEVATION(3-D)

More Related