A Geographic Information System for Great Lakes Aquatic Habitat
 
 

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Using the Great Lakes GIS

The User Guide is intended to introduce and orient users to the Great Lakes GIS Project. Users can find information on goals and objectives, data, and projects available in the Great Lakes GIS. For guidance on using the GLGIS, see support documents on the GIS Help page. To learn more about the project goals and objectives, visit the project background (available from the Home page) and Classifications pages.

 

DISCLAIMERS:

Data in the GLGIS have been contributed by partner agencies, each with a disclaimer to data use. Please view all agency disclaimers before using the Great Lakes GIS Project.

 

DATABASE ORGANIZATION:

The GLGIS is organized in four major directories. The data directory stores all data, both tabular and spatial (i.e., GIS). Within the data directory are five sub-directories storing base/political data, biological data, environmental data, physical data, and classifications, respectively. The project files directory stores pre-manufactured digital map documents that display data (with appropriate symbology) related to a particular theme or region. The mini-projects sub-directories are comprehensive with respect to a particular research question. The sub-directories typically include data, reports, and digital map documents. Finally, the support documents folder contains documents related to GIS Fact Sheets, FAQs, and all educational materials that are associated with the project.

 

SOFTWARE:

To take full advantage of the data and projects in the GLGIS, users will need GIS software such as ArcView 3.x or ArcGIS 8.3+. Digital map documents are only complatible with the latter, however, all spatial data (both raster and vector) can be viewed in either program. If you do not currently have any GIS software on your computer a free copy of ArcReader can be obtained online from ESRI. ArcReader is a relatively easy piece of software to learn, as the interface is very intuitive and the available online help files are well written and quite useful. Note that it is limited in terms of functionality.

 

COORDINATE SYSTEM/PROJECTION:

All spatial data in the GLGIS are distributed in decimal degrees (i.e., latitude and longitude) in the NAD 83 datum unless otherwise noted. Two projections were developed for the Great Lakes region (customized from the Albers Equal-Area projection) that minimize distortion in the region. The projection files are included in the support documents folder. For detailed information on projections and how to use projection files, see the projections help document available on the GIS Help page.

 

CITATIONS:

If the data involve any derivative of Ontario Ministry of Natural Resources (OMNR) data, please include the citation:

Produced by the Great Lakes Fishery Commission under Licence with the Ontario Ministry of Natural Resources copyright Queen's Printer for Ontario XXXX (where XXXX = current year)

.....

For data sets created by the Institute for Fisheries Research**:

(** Words in "{}" are not verbatim.)

{Name of spatial data set} ({name of file, format of file}). {Year file was created}. Produced by {the agency name, agency city, agency state}, USA. Produced and supplied by {the project name, project city, project state}, USA ({month distributed, year distributed}).

Example:

National Land Cover Dataset (lhb_nlcd, GRID). 1992. Produced by the U.S. Geological Survey, EROS Data Center, Sioux Falls, South Dakota, USA. Produced and supplied by the Great Lakes GIS project of the University of Michigan and Michigan Department of Natural Resources, Institute for Fisheries Research, Ann Arbor, Michigan, USA (October, 2005).

.....

For data sets created by a U.S. agency**:

(** Words in "{}" are not verbatim.)

{Name of spatial data set} ({name of file, format of file}). {Year file was created}. Produced by {the agency name, agency city, agency state}, USA. Supplied by {the project name, project city, project state}, USA ({month distributed, year distributed}).

Example:

National Land Cover Dataset (lhb_nlcd, GRID). 1992. Produced by the U.S. Geological Survey, EROS Data Center, Sioux Falls, South Dakota, USA. Supplied by the Great Lakes GIS project of the University of Michigan and Michigan Department of Natural Resources, Institute for Fisheries Research, Ann Arbor, Michigan, USA (October, 2005).

 

FEEDBACK:

The GLGIS is constantly evolving. We appreciate any feedback you could offer, as it helps us create a database that meets the needs of a diverse community. There are three options to provide feedback. Users can: (1) return the GLGIS Survey and Feedback Form to give information about users' skill levels and interests, (2) return the GLGIS Error Report Form to report errors or inconsistencies in the database, or (3) contact the Project Coordinator, Lacey Mason (e-mail: lmas@umich.edu, phone: 734.663.3554 x.12155), directly to address how the database can be used to meet their goals.

 



Copyright 2005 Great Lakes GIS. All Rights Reserved.