Unsewered Communities in Iowa


Metadata
File Identifier:
Metadata Language: eng; USA
: utf8
Resource Type: Dataset
Responsible Party:
Individual Name: NRGIS Librarian
Organisation Name: Iowa Geological and Water Survey, DNR
Role: Point Of Contact
Contact Info:
Voice: 319-335-1575
Delivery Point: 109 Trowbridge Hall
City: Iowa City
Administrative Area: IA
Postal Code: 52242-1319
E-Mail Address: gis_library@igsb.uiowa.edu
Metadata Date: 2007-01-01
Metadata Standard Name: ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
Metadata Standard Version: ISO 19115-2:2009(E)
Data Identification
Abstract: 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.
Purpose: The dataset was developed to assist the Unsewered Community Task Force in prioritizing communities to receive loans to fund the upgrade or installation of sewer/septic systems. This digital, geographically referenced data set was developed by the Iowa Department of Natural Resources to carry out agency responsibilities related to management, protection, and development of Iowa's natural resources.
Language: eng; USA
Citation:
Title: Unsewered Communities in Iowa
Date:
Date: 2007-03-30
Date Type: Publication Date
Edition: 20070330
Organisation Name: IDNR, GIS Section
Role: Originator
Organisation Name:
Role:
Contact Info:
Online Resource: ftp://ftp.igsb.uiowa.edu/IA_State/Environmental_Regulation/unsewered_communities.zip
Point Of Contact:
Individual Name: Brent Parker
Organisation Name: IDNR
Position Name: Field Office 5
Role: Point Of Contact
Contact Info:
Voice: (515) 725-0337
E-Mail Address: Brent.Parker@dnr.state.ia.us
Representation Type: Vector
Topic Category: Environment and Conservation
Keyword Collection:
Keyword: Sewer, septic
Associated Thesaurus: None
Spatial Extent:
West Bounding Longitude: 202073.808723
East Bounding Longitude: 736849.210393
North Bounding Latitude: 48822673.786539
South Bounding Latitude: 4470598.397186
Constraints: 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.
Legal Constraints:
Use Constraints: Other Restrictions
Other 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.
Legal Constraints:
Access Constraints: Other Restrictions
Other Constraints: Access Constraints: None
Security Constraints:
Classification: PUBLIC
Classification System: State of Iowa Enterprise Data Classification Standard
Handling Description:
Distribution
Distribution Format:
Format Name: shapefile
Format Version:
File Decompression Technique: zip
Distribution Format:
Format Name: SDE Feature Class
Format Version:
Transfer Options:
URL: ftp://ftp.igsb.uiowa.edu/IA_State/Environmental_Regulation/unsewered_communities.zip
Transfer Options:
URL: http://www.iowadnr.gov/
Distributor:
Distributor Contact:
Organisation Name: Iowa Geological and WaterSurvey, DNR
Position Name: GeoSpatial DBA / NRGIS Librarian
Role: Distributor
Contact Info:
Voice: 319-335-1575
Delivery Point: 109 Trowbridge Hall
City: Iowa City
Administrative Area: IA
Postal Code: 52242
E-Mail Address: gis_library@igsb.uiowa.edu
Distributor:
Distributor Contact:
Individual Name: GeoSpatial DBA
Organisation Name: Iowa Geological and Water Survey, DNR
Role: Distributor
Contact Info:
Voice: 319-335-1575
E-Mail Address: Brent.Parker@dnr.state.ia.us
Quality
Scope: Dataset