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Great Lakes Hydrometeorological Station Directory
Overview |
About the Mapping Interface
Open Data Summary
Open Mapping Tools Summary
Open Mapping Interface
Open Data Center Contact Information
Overview
This project was sponsored by the Great Lakes Hydraulics and Hydrology Branch of the U.S. Army Corps of Engineers, and the directory was compiled by NOAA's Great Lakes Environmental Research Laboratory (NOAA-GLERL). This directory features some 20,000 listings of station characteristics for over 11,000 hydrological and meteorological stations located throughout the Great Lakes region. It is intended as a resource for determining period of record, types of data collected and data availability. The mapping tool provides a geographic orientation and allows the database to be searched both by station characteristics and by location.

About the Mapping Interface
Map Window
The Map Window is the geographic point of access to the Great Lakes Hydro-Meteorological Station Directory. Political boundaries, main land and water divisions and the station points are depicted and available for user queries via this part of the interface.
Overview Map
The Overview Map, located in the upper left corner of the map window, highlights the portion of the Great Lakes geographic region being shown in detail in the main map window. If desired, it can be turned off by clicking the rightmost button in the top row of the toolbar.
Toolbar
The 12 buttons on the Toolbar allow the user to interact with the Map Window and the databases connected to it. Their functions are:
Top row - Zoom In | Zoom Out | Pan (across the map to change area being viewed) | Identify (an individual feature in the active layer) | Select (one or more features from the active layer) | Overview Map (on or off)
Bottom row - Zoom to the Full Extent of the map | Zoom to the extent of the Active Layer | Zoom to the previous extent | Build a Query | Clear the Data Window | Print
For a detailed description of these tools, see the Mapping Tools Summary
Legend
The Legend describes each map layer being depicted in the Map Window. The "Visible" checkbox allows the user to toggle layers on and off as desired, and the "Active" button indicates which layer will respond to data queries.
Data Window
The Data Window is where results from use of the Identify and Select buttons appear, and where custom database queries can be constructed using the SQL database query language.

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