Introduction
Location Map
Base Map
Database Schema
Conventions
GIS Analyses
Flowchart
GIS Concepts
Results
Conclusion
References

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Welcome!

Our names are Jia Ling and Samantha Stiffler. In fulfillment of our NR505 course requirement, we decided to illustrate the concept of error in geographic data. Specifically, we focused on resampling, georeference, temporal, and human errors. In the realm of GIS, we feel that too often users adopt datasets without questioning the accuracy of their data. Consequently, decisions made based on uninformed errors may lead to poor decision making and is just bad science. Therefore, we decided to study two frequently used datasets produced by the USGS: National Elevation and National Hydrography Datasets. We investigated how well the two datasets corroborated with each other. Needless to say, the two datasets did not match well and hence our discussion on error propagation found in GIS data.

Please select from the left menu to explore a bit more about this project and thanks for checking us out. If you have any questions, feel free to reach us by clicking here.