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The following is a list of counties in Michigan with populations of at least 100,000 based on 1980 U.S. Census data. Historic census data from 1970 and 1990 are included to reflect trends in population increases or decreases. Counties that are part of the Detroit metropolitan area are shaded in tan.
Historical geographic information systems are built from a variety of sources and techniques. An especially prominent method is the digitization and georeferencing of historical maps. Old maps may contain valuable information about the past. By adding coordinates to such maps, they may be added as a feature layer to modern GIS data.
The term 100-year flood indicates that the area has a one-percent chance of flooding in any given year, not that a flood will occur every 100 years. [2] Such maps are used in town planning, in the insurance industry, and by individuals who want to avoid moving into a home at risk of flooding or to know how to protect their property. FIRMs are ...
From February 15 to the end of March 1904 occurred the most destructive flood as far as property was concerned in the recorded history of Sacramento. The greatest known flood occurred forty-odd years before, In January, 1862 and was due to rainfall, the precipitation in December, 1861 and January, 1962 just prior to it having been 23.62 inches.
The Water Resources Development Act of 1986 (WRDA 1986) is part of Pub. L. 99–662, a series of acts enacted by Congress of the United States on November 17, 1986. [1] WRDA 1986 established cost sharing formulas for the construction of harbors, inland waterway transportation, and flood control projects and established rules therefor.
1928-1932 and 1938-1940 Automobile Legal Association Green Book: large scale maps (not very detailed - only major routes) and major city inset maps; turn-by-turn directions can also be used to find old routings through cities; also contains rough route logs (i.e. cities passed through) for some of the longer routes in all eastern states; 1938 ...
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified file.
MapWindow GIS and its associated MapWinGIS ActiveX Control were originally developed by Daniel P. Ames and a team of professors and students at Utah State University in 2002-2003 as part of a research project with the Idaho National Laboratory in Idaho Falls, Idaho as a GIS mapping framework for watershed modelling tools in conjunction with source water assessments conducted by the laboratory.