Generating contour lines with the digital surface model (DTM) is recommended when there are objects on the project's surface, such as high vegetation or buildings. Sri Lanka - Contour Lines 700+ Downloads This dataset updates: Every year Contact the contributor Downloads. You can achieve a high level of detail in the contour lines because the DSM can have a resolution as high as the average ground sampling distance (GSD) of the project.Ĭontour lines using the digital surface model
Generating contour lines with the digital surface model (DSM) is recommended when there are no objects on the project's surface, such as high vegetation or buildings. The extent and highest resolution possible of the contour lines will depend on the source layer. It is a type of contour lines on a map of chart with connects the point of equal temperature of a given area. For 1:25 000 scale maps the interval between contours is usually 5 metres, although in mountainous regions it may be 10 metres. It is a type of contour lines on a map which connect the point of equal salinity in the water body (majorly contour). They give a better understanding of the variations in elevation of the land surface or topography of a project area.Ĭontour lines can be generated with the digital surface model (DSM) or the digital terrain model (DTM). A contour is a line drawn on a map that joins points of equal height above sea level. Contour lines are lines connecting points of equal elevation. Contour lines, aerial photography, spot elevations and drainage are used as guides for shading.
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