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Access and use of this website is subject to the following terms and conditions. By accessing this site you accept the following. Information from this site is controlled by Northern Illinois University's Advanced Geospatial Laboratory, and is considered tangible research property as defined by the Northern Illinois University intellectual property policy. This site is not to be used for commerical or non-university appications. You agree not to use or launch any automated system that collects or harvests the data provided for use in any external applications or research purposes. You will not access the site in a manner that sends more requests to the servers than reasonable. You acknowledge the use of this site is at your own risk. There are no guarantees of service or accuracy of service. The website is provided as is, without warranties of any kind, either express or implied. In no event will the Advanced Geospatial laboratory be held liable for incidental, indirect, or consequential damages arising out of your use of this site. Your access to this website may be terminated without notification.