In John Snow determined the source of a cholera outbreak in London by marking points on a map depicting where the cholera victims lived, and connecting the cluster that he found with a nearby water source. This was one of the earliest successful uses of a geographic methodology in epidemiology. While the basic elements of topography and theme existed previously in cartographythe John Snow map was unique, using cartographic methods not only to depict but also to analyze clusters of geographically dependent phenomena.
The Jo Daviess County GIS Internet Mapping Site was developed to provide geographic information to county departments, other government entities, non-profit organizations, businesses, and the public.
Three portals are available for viewing online maps: Public Access is free to all users. It has limited base map information such as township boundaries, road centerlines, and corporate boundaries.
Subscription Access is available to users from the public, businesses, non-profit organizations, and other government entities wishing to view more detailed geographic information.
The subscription access fees are entirely used to offset the recurring costs to operate this site. Geographic data available through the Subscription Access includes: Government Access is limited to Jo Daviess County employees and officials.
Please note that large amounts of data are potentially transmitted during a user's session on this site. The time required for the maps to load into your browser will depend on your Internet connection speed and the amount of data being requested.
This site may be taken offline periodically to install data updates and software maintenance. All efforts will be made to limit downtime.
Email notifications with the scheduled downtime will be sent to users prior to performing maintenance. Please use the button below to download and install the free player. You will only need to install the player once - prior to using the site for the first time.Discover the best Remote Sensing & GIS in Best Sellers.
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Request demos & free trials to discover the right product for your business. The County of San Bernardino's Geographic Information Management Systems (GIMS) group has the responsibility to acquire imagery of its populated areas and landscapes in various formats and types, create the highest level of geospatial data possible, establish technical infrastructure, and develop public relations with county departments, local, state and federal governments and other agencies.
INTRODUCTION. Making good maps can be challenging, time consuming, and expensive, but recently, a new set of cheap and free mapping tools has enabled almost anyone with a computer to easily make a map—but good maps are not usually the result.
Broward County GIS offers select GIS data free to the public for download.
Data is provided in a zipped shapefile format and is the best available at this time. GIS Tutorial 1 for ArcGIS® Pro: A Platform Workbook is an introductory text for learning ArcGIS Pro, the premier professional desktop GIS application.
In-depth exercises that use ArcGIS Pro, ArcGIS Online, and other ArcGIS apps feature the latest GIS technology to show readers how to make maps, how to create and analyze spatial data, and how to manage systems with GIS.