IndianaMap Update – November 2016

igsReported By:  Chris Dintaman
GIS Specialist
Indiana University | 611 N. Walnut Grove Avenue | Bloomington, IN 47405-2208

Layer Updates

We have just added one layer to the map showing stream mileage measurements of select streams and rivers of Indiana, data supplied by the Indiana Department of Natural Resources (IDNR). We also have updated five transportation layers with data supplied by the Indiana Department of Transportation (INDOT). At the request of INDOT personnel, several older transportation layers have been removed from the map. If you are a frequent user of these data, please use the links below to access the Layer Gallery to download data and metadata for each of the layers.

  • Stream Mileage (IDNR), 20160928 (1:24,000) – Shows stream mileage in tenths of a mile (with exceptions). Stream mileage maps for streams in Indiana were originally developed by the U. S. Army Corps of Engineers (Louisville, Detroit and Chicago districts) and the Indiana Department of Natural Resources, Division of Water, from 1965 – 1973. These maps depict stream mileages in tenths of a mile (with exceptions) mapped on USGS 7.5-minute quadrangle maps, at a scale of 1:24000. Methodology for determining stream mileage largely follows the document “River Mileage Measurement”, Water Resources Council, 1968. Points representing each tenth of a mile were captured by DNR staff using geo-rectified copies of the original source documents. These points are attributed with the stream name as shown on the original documents, and the basin, from the Division of Water standard basin schema. This dataset was developed in 2016. Updated hydrographic dataset sources (namely the USGS National Hydrography Dataset) are captured to a much finer resolution than was possible when this data was originally compiled. Additionally, rivers and streams are dynamic, eroding and depositing material and changing course over time, sometimes significantly. Limitations of this dataset compared to other derivations of stream mileage should be recognized. Stream mileage for the Ohio River were taken from the USGS 7 ½ minute quadrangle maps, and are shown at 1 mile increments. Mileage for the Ohio River is historically taken as miles from Pittsburgh (the confluence of the Allegheny and Monongahela Rivers). Discrepancies in the original maps include: Missing mileage data for miles 569-579 for the Ohio River in the Bethlehem quad, an extra 1/10 of a mile between miles 66.5 and 67 for Sugar Creek in Basin 19, an extra 1/10 of a mile between miles 17.5 and 18 for Middle Fork Blue River in Basin 27, an extra 1/10 of a mile between miles 17.5 and 18 for Little Calumet River in Basin 1.
  • Interstates (INDOT), 2015 – Shows Indiana interstates compiled by Road Inventory of the Indiana Department of Transportation (INDOT), as part of the Indiana County Log Line Inventory. The data set was compiled by Indiana GIS Department of Transportation (INDOT), Road Inventory Section. Each County Log Line Inventory is placed as to Position.(County Log is a utilized measurement from a County Line intersecting with a Highway Network, for example Interstate, State and US. Measurement is from West to East and South to North). Position also utilizes Jurisdiction, County, Road System, Route Name and Alternative Route. The County Log Line Inventory is as of 2006-2015.
  • Mile Markers – System 1 Roads (INDOT), 2015 – Shows mile markers for System 1 roads that include Interstates, U.S. Highways, State Routes, Ramps, Institutional Roads (roads in state university properties, state hospitals, Indiana National Guard properties), and roads in properties owned by the Indiana Department of Natural Resources and maintained by INDOT. Each Reference Post point Inventory is placed as to Position, Measure, and by Reference Post Name. The posts are “names” for known spots on the road. The names are sequentially numbered along the road. The Reference Post point Inventory is Dated as of 2006-2015. The data set was compiled by Road Inventory of the Indiana GIS Department of Transportation (INDOT).
  • Roadways (INDOT), 2015 (1:24,000) – Shows the Indiana Functional Class Line Inventory compiled by Road Inventory of the Indiana GIS Department of Transportation (INDOT). Each Functional Class Line Inventory is placed as to Position, From and To Measure, and contains 7 classifications. Classifications are: Interstate, Principal Arterial-Other Freeways or Expressways, Principal Arterial-Other, Minor Arterial, Major Collector, Minor Collector, and Local Functional These classification is according to the character of service that the road is intended to provide. Class Line Inventory is Dated as of 2011-2015.
  • Traffic Counts, 2014 (1:24,000) – Shows traffic counts (average annual daily traffic, factored to year 2014) for roadways in Indiana. The data set was compiled by Road Inventory of the Indiana GIS Department of Transportation (INDOT). Each road segment contains the inventory event of Annual Average Daily Traffic Counts dated for the year 2014.
  • Roads (INDOT), 2015 (1:24,000) – Shows roads in Indiana, consisting of city streets, county roads, and U.S., state and interstate roads, and other roads. These data are from the Indiana County Log Line Inventory compiled by Road Inventory of the Indiana GIS Department of Transportation (INDOT). Each County Log Line Inventory is placed as to Position. (County Log is a utilized measurement from a County Line intersecting with a Highway Network, for example Interstate, State and US. Measurement is from West to East and South to North). Position also utilizes Jurisdiction, County, Road System, Route Name and Alternative Route. County Log line inventory is as of 2006-2015.

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