This data set was compiled by Indiana University, Indiana Geological Survey, using data believed to be accurate; however, a degree of error is inherent in all data. This product is distributed "AS-IS" without warranties of any kind, either expressed or implied, including but not limited to warranties of suitability to a particular purpose or use. No attempt has been made in either the design or production of these data to define the limits or jurisdiction of any federal, state, or local government. These data are intended for use only at the published scale or smaller and are for reference purposes only. They are not to be construed as a legal document or survey instrument. A detailed on-the-ground survey and historical analysis of a single site may differ from these data.
CREDIT:
It is requested that the dataset be cited in any products generated from this data. The following source citation should be included: [Unconsolidated_Thickness_Contours_Maumee_Basin_IGS_IN: Unconsolidated Thickness, 2012 (Indiana Geological Survey, 1:200,000, ESRI Shapefile)].
WARRANTY:
Indiana University, Indiana Geological Survey warrants that the media on which this product is stored will be free from defect in materials and workmanship for ninety (90) days from the date of acquisition. If such a defect is found, return the media to Publication Sales, Indiana Geological Survey, 611 North Walnut Grove, Bloomington, Indiana 47405 2208, and it will be replaced free of charge.
LIMITATION OF WARRANTIES AND LIABILITY:
Except for the expressed warranty above, the product is provided "AS IS", without any other warranties or conditions, expressed or implied, including, but not limited to, warranties for product quality, or suitability to a particular purpose or use. The risk or liability resulting from the use of this product is assumed by the user. Indiana University, Indiana Geological Survey shares no liability with product users indirect, incidental, special, or consequential damages whatsoever, including, but not limited to, loss of revenue or profit, lost or damaged data or other commercial or economic loss. Indiana University, Indiana Geological Survey is not responsible for claims by a third party. The maximum aggregate liability to the original purchaser shall not exceed the amount paid by you for the product.
"Locations based only on the street address, driving directions, or other location information provided on the well record are considered unlocated records and have no x, y coordinates, only township, range, section, and quarter-quarter-quarter sections (if estimated).
"The x, y coordinates are from the calculated centroid of the smallest possible individual polygon that matched the water well location data. Some records have no quarter sections and/or some of the polygons could not be subdivided, so the centroid of the section was used for those water well records. These are the least accurate coordinates and in a regular one-mile square section the x, y coordinates will generally be within a half-mile of the office located section, on irregular sections, the distance may be greater. The best location values are on the records with quarter-quarter-quarter sections and typically will be within 150 meters of the office located quarters.
"A small number of the data points were checked for accuracy and methods used should keep the x, y coordinates within the proper section in most cases. However, due to the complexity and in cases redundancy in the public land survey system for Indiana some x, y pairs may not be located in the proper section or even the proper county. Other sources of error may be caused by misinterpretation of the driving directions or office locating. Several areas have different survey systems than the Congressional TRS (Clark Military Grant, Military Donations, Meridian Road Lines, Indian Treaties etc.) and no attempt at this time was made to provide centroids for these areas.
"Located records were primarily field located based on the location identified on the USGS 1:24,000 7.5 minute series topo map by the field locator. In some cases the structure or subdivsion may not be on the map and location is based on topography. So some error may be inherent in the field locations and points placed on the map ( a single point on a map may be 100 feet across). The scale is based USGS 1:24,000 7.5 minute series topographic maps. However, in most cases locations of mislocated wells can have large errors, with the reported locations having no meaning."
The bedrock elevation model named "BR_Z_FT" was resampled to have the same cell resolution and alignment as the digital elevation model named "DEM_5ft." This was performed using the "Resample" tool of ESRI ArcToolbox.
The bedrock elevation model named "BR_Z_FT_2" was subtracted from a 5-foot DEM using the "Raster Calculator" tool of ESRI ArcToolbox. The output data set was a new raster model named "UNC_THICK."
The unconsolidated thickness model named "UNC_THICK" was resampled from a cell resolution of 10 meters to 100 meters using the "Resample" tool of ESRI ArcToolbox. The new model was named "UNC_THICK2."
From the raster model named "UNC_THICK2", an ESRI polyline shapefile showing unconsolidated thickness contours for the Maumee watershed region was created, its name being "Maumee_UNC_Thickness_Contours_1." To create this shapefile, the "Contour" tool of ESRI ArcToolbox was utilized with the "UNC_THICK2" model as input, "Maumee_Wtrshed_BR_Contours_1" as output, and a contour interval of 40 feet was established.
The lengths (in meters) of contour line features were calculated, creating a field named "Shape_Length" in the attribute table of "Maumee_UNC_Thickness_Contours_1." This field was then sorted and those features whose lengths were less than 10,000 meters were selected then deleted. The intention was to remove unwanted detail (i.e. contouring of very small features) produced by the "Contour" tool.
STEP 1: The "Simplify Line" tool of ESRI ArcToolbox was used on "Maumee_UNC_Thickness_1" to remove vertices that weren't critical to preserving the shapes of contour line features. This had a generalizing effect on the contours because some detail was reduced with the deletion of vertices. The output shapefile produced by this operation was named "Maumee_UNC_Thickness_2."
STEP 2: The "Smooth Line" tool of ESRI Arctoolbox was used on "Maumee_UNC_Thickness_2" to, as the name entails, smooth the contour lines. The smoothing algorithm used was that of a bezier interpolation, which adds curvature while maintaining that contour lines run through the original vertices. The output from this operation was a shapefile named "Maumee_UNC_Thickness_3."
STEP 3: Manual editing was performed on "Maumee_UNC_Thickness_3" to remove any remaining unwanted detail in the contour line features.
The contour shapefile named "Maumee_UNC_Thickness_3" was clipped to the boundary of the Maumee watershed region using the "Clip" tool of ESRI ArcToolbox. The output of this operation was a shapefile named "Unconsolidated_Thickness_Contours_Maumee_Basin_IGS_IN," which is the final product of the process steps and the data set for which this metadata was written.
This metadata file was pre-parsed and parsed using CNS (Chew and Spit, v. 2.6.1) and MP (Metadata Parser, v. 2.7.1) software written by Peter N. Schweitzer (U.S. Geological Survey). The errors generated by MP were all addressed and corrected.
It is requested that the dataset be cited in any products generated from this data. The following source citation should be included: [Unconsolidated_Thickness_Contours_Maumee_Basin_IGS_IN: Unconsolidated Thickness, 2012 (Indiana Geological Survey, 1:200,000, ESRI Shapefile)].
WARRANTY:
Indiana University, Indiana Geological Survey warrants that the media on which this product is stored will be free from defect in materials and workmanship for ninety (90) days from the date of acquisition. If such a defect is found, return the media to Publication Sales, Indiana Geological Survey, 611 North Walnut Grove, Bloomington, Indiana 47405 2208, and it will be replaced free of charge.
LIMITATION OF WARRANTIES AND LIABILITY:
Except for the expressed warranty above, the product is provided "AS IS", without any other warranties or conditions, expressed or implied, including, but not limited to, warranties for product quality, or suitability to a particular purpose or use. The risk or liability resulting from the use of this product is assumed by the user. Indiana University, Indiana Geological Survey shares no liability with product users indirect, incidental, special, or consequential damages whatsoever, including, but not limited to, loss of revenue or profit, lost or damaged data or other commercial or economic loss. Indiana University, Indiana Geological Survey is not responsible for claims by a third party. The maximum aggregate liability to the original purchaser shall not exceed the amount paid by you for the product.