This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

Unsewered Communities in Iowa

Metadata Updated: July 19, 2013

The unsewered communities file was originally conceived as a representation of communities without a municipal sewer system or on-site septic systems. The selection of communities was based on criteria established by a committee of DNR staff (Brent Parker, Field Office 5, Todd Bishop, GIS Section and Scott Vanderhart, Director's Office). The committee decided to look for groups of ten houses or more clumped within a 10 acre area which did not fall into an incorporated area. The areas that were detected were characterized into 1 of 2 classes: Officially Named, Unincorporated Towns (from the USGS Geographic Names Information System (GNIS) shapefile) or Unamed but Developed Rural Subdivisions. To attribute the data, the unincorporated GNIS point file was joined with 2000 census data (Population, Median House Income, Housing Units, and Occupancy). For the rural subdivisions, polygons were digitized around these areas in ArcView 3.2a using 2002 color-infrared aerial photography and USGS digital topographic maps (DRGs). A point file was then generated using the polygons' centroids and attributed with the number of visible housing units observed within the corresponding polygon boundaries. The resulting two point files were then merged and the sites were assessed to determine if they had access to a wastewater treatment plant. The polygon and point files were both used as an initial source of locations for potentially unsewered communities. Digital incorporated area files from 1990 census data were used to exclude communities that fell within the boundaries of known incorporated areas. The product of this analysis was then submitted for review to county sanitarians and rural water entities. After receiving their responses, some communities were removed from, and others added to, the initial file. The reviewers also added comments in regard to specific communities.

Access & Use Information

Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

Downloads & Resources

Dates

Metadata Date January 1, 2007
Metadata Created Date July 19, 2013
Metadata Updated Date July 19, 2013
Reference Date(s) March 30, 2007 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from Iowa Geospatial Data Clearinghouse

Additional Metadata

Resource Type Dataset
Metadata Date January 1, 2007
Metadata Created Date July 19, 2013
Metadata Updated Date July 19, 2013
Reference Date(s) March 30, 2007 (publication)
Responsible Party IDNR (Point of Contact)
Contact Email
Access Constraints Use Constraints: The development of the coverages in the NRGIS Library represents a major investment of staff time and effort. As a professional responsibility, the Iowa DNR expects to receive proper credit when these GIS coverages are utilized. he Department also expects that the original documentation will remain with any redistribution of these coverages., Access Constraints: None
Bbox East Long 736849.210393
Bbox North Lat 48822673.786539
Bbox South Lat 4470598.397186
Bbox West Long 202073.808723
Coupled Resource
Frequency Of Update asNeeded
Guid
Harvest Object Id de8f5ff9-5777-42d0-b3f7-ce6dc68d8bdf
Harvest Source Id 2abfde33-b6a6-461c-879b-612565f3a067
Harvest Source Title Iowa Geospatial Data Clearinghouse
Licence Although efforts have been made in correcting errors in order to make this information useful to the Department, the Department assumes no responsibility for errors in the information. Similarly, the Department assumes no responsibility for the consequences of inappropriate uses or interpretations of the data made by anyone to whom this data has been made available. The Department bears no responsibility to inform users of any changes made to this data. Anyone using this data is advised that precision implied by the coverage may far exceed actual precision. Comments on this data are invited and the Department would appreciate that documented errors be brought to staff attention. Although efforts have been made in correcting errors in order to make this information useful to the Department, the Department assumes no responsibility for errors in the information. Similarly, the Department assumes no responsibility for the consequences of inappropriate uses or interpretations of the data made by anyone to whom this data has been made available. The Department bears no responsibility to inform users of any changes made to this data. Anyone using this data is advised that precision implied by the coverage may far exceed actual precision. Comments on this data are invited and the Department would appreciate that documented errors be brought to staff attention.
Metadata Language
Metadata Type geospatial
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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