Presentation on theme: "Orienteering in the terrain"— Presentation transcript:
1Orienteering in the terrain Basic Map Info - 2Orienteering in the terrain
2An orienteering map is different from a topographic map: Mountaineers use a topographic map. The scale is usually 1 / or 1 /A topographic map shows: * only very distinct roads and vehicle tracks * only distinct rivers * forests - green * open areas - white
3An orienteering map is more detailed: The scale is usually 1/* vegetation is more detailed: each colour has a meaning showing difference in vegetation * very small streams, even dried up water courses are shown * even small paths, tracks are shown
4What can you see on a course map for orienteering? 1 - The scale 2 - The elevation (difference in height) between two contours --> “contour interval” 3 - The category this course belongs to 4 - The length of the course (as the crow flies)5 - Control point definitions6 - The course itself, shown by: * the start (triangle) * the finish (two concentric circles) * the control points (single circle)
51 cm on the map = 100 meters on the terrain 1 / 5 000: THE SCALEThe scale of the map is useful in estimating the distance from where you are now, and where you want to go.1 / :1 cm on the map = 100 meters on the terrain1 / 5 000:1 cm on the map = 50 meters on the terrainYou need to know how to count your paces!
6Pace counting Homework: Measure your pace for 100 meters * count 2 paces for 1* count: - uphill - downhill - straight bit* count: - walking - jogging - running
7Contour intervalThe contour interval shows the vertical difference in height (the elevation) between two contours.Contour interval = 5 m5 m = One and a half stories in a block of flatsThe distance between two contours on the map will show the effort for climbing;Less effortSteep climb
8Contour interval Homework: if the contour interval is 5 m Assuming the first contour lies at the lowest point (car park surface),how many contours forA?B?C?Which one has the most climb?Note: “most climb” may not mean “longest distance”!BCA
9COLORS Yellow White Green show density of vegetation Black shows “man-made features” or “stone features” rocks, stony ground, buildings, roads, paths, fences, special man-made objects... Blue shows water lakes, rivers, streams, dried up water course, well, fountain, swamp...Brown shows earth contours, knolls, pits, earth banks, special earth features...
10Black Paved area Unpaved path Rockface (teeth point downwards) BuildingMan-made objectAsphalt RoadFenceRockPower line
11Man-made line features roadsfencesstone wallpower lines
15asphalt roadunpaved vehicle trackdistinct footpathless distinct footpathfence (passable)fence (impassable - forbidden to pass)ruined fencestone wallsmall power line or telephone linehigh voltage power line