Geospatial data about St. Clair County, Alabama Parcels. Export to CAD, GIS, PDF, CSV and access via API.

By using this data, you agree to the SEMCOG Copyright License Agreement. 1-foot elevation contour lines for St. Clair County, Michigan, stored in file geodatabase format. Created from LiDAR data collected in 2017-2018.

Definition/Description

Flood hazard areas identified on the Flood Insurance Rate Map are identified as a Special Flood Hazard Area (SFHA). SFHA are defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year. The 1-percent annual chance flood is also referred to as the base flood or 100-year flood. SFHAs are labeled as Zone A, Zone AO, Zone AH, Zones A1-A30, Zone AE, Zone A99, Zone AR, Zone AR/AE, Zone AR/AO, Zone AR/A1-A30, Zone AR/A, Zone V, Zone VE, and Zones V1-V30. Moderate flood hazard areas, labeled Zone B or Zone X (shaded) are also shown on the FIRM, and are the areas between the limits of the base flood and the 0.2-percent-annual-chance (or 500-year) flood. The areas of minimal flood hazard, which are the areas outside the SFHA and higher than the elevation of the 0.2-percent-annual-chance flood, are labeled Zone C or Zone X (unshaded).Visit our website

Community Development, Planning Commission, City Ordinance create and define Zoning Districts. Districts are established by ordinance, recorded with St. Clair County, and managed by Community Development staff.

The United States Environmental Protection Agency (USEPA) requires Michigan to attain the National Ambient Air Quality Standards (NAAQS) for six criteria pollutants. The data contained in this layer file outlines the statewide nonattainment areas for the 2010 Primary Sulfur Dioxide NAAQS as designated by the USEPA. There are two partial nonattainment areas currently for this standard located in Southeast Michigan; one within St. Clair county and the other within Wayne county along the Detroit River. Further information about the six criteria pollutant NAAQS, including sulfur dioxide can be found on EGLE Air Quality Division’s SIP and Attainment webpage.Questions about this data can be directed to EGLE-Maps@Michigan.gov.

BY USING THIS WEBSITE OR THE CONTENT THEREIN, YOU AGREE TO THE TERMS OF USE. The project consisted of color digital aerial imagery acquisition and color digital orthophoto production at 0.5-foot ground sample distance (GSD) for Oakland County (approximately 907 square miles). The aerial photography plan and the 2, 500 foot x 2, 500 foot digital orthophoto tiles were based on the SEMCOG approved Tile system, based upon the State Plane Grid.

In the Spring of 2010, Southeast Michigan Council of Government (SEMCOG) obtained new orthoimagery for all seven of the membership counties - Livingston, Macomb, Monroe, Oakland, Washtenaw, Wayne, and St. Clair.