What is a legend on a topographic map?
What is a legend on a topographic map?
United States Geologic Service (USGS) Topographic Map Key (Legend) Interpreting the colored lines, areas and other symbols is necessary in using the topographic maps. The USGS Topographic Maps use symbols or colors to represent features, and this Topographic Map Key explains what they mean.
What do the different colors mean on a topographic map?
The colors of the lines usually indicate similar classes of information: topographic contours (brown); lakes, streams, irrigation ditches, and other hydrographic features (blue); land grids and important roads (red); and other roads and trails, railroads, boundaries, and other cultural features (black).
What do the numbers mean on a topo map?
It is found in the top right hand corner of the map (Fig. The next thing that you should notice on a topographical map are the numbers running all around the outside of the map. These numbers represent two grid systems that can be used to find your exact location. The first is called latitude and longitude.
What does Black represent on a topographic map?
Finally, black is used to represent man-made objects, including trails. Red is used for man-made features, like main roads or political boundaries, and purple for new changes or updates on the map that weren’t previously represented.
What is a topographic map legend?
Topographic Map Legend and Symbols The topographic maps on TopoZone were created by the United States Geological Survey (USGS) and have evolved for more than a century. Over time the maps became more detailed and new symbols were added for the different terrain, natural features, land boundaries, and man-made structures depicted by the surveyors.
What is the USGS topoView?
TopoView highlights one of the USGS’s most important and useful products, the topographic map. In 1879, the USGS began to map the Nation’s topography. This mapping was done at different levels of detail, to support various land use and other purposes. As the years passed, the USGS produced new map versions of each area.
When did the USGS start making topographic maps?
In 1879, the USGS began to map the Nation’s topography. This mapping was done at different levels of detail, to support various land use and other purposes. As the years passed, the USGS produced new map versions of each area. TopoView shows the many and varied topographic maps of each of these areas through history.
What are usgis topo maps?
US Topo maps repackage geographic information system (GIS) data in traditional map form. This benefits non-specialist map users, as well as applications that need traditional maps.
