Introduction
Location Map
Base Map
Database Schema
Conventions
GIS Analyses
Flowchart
GIS Concepts
Results
Conclusion
References
GIS CONCEPTS
The following GIS concepts were utilized in our project:
1. Join (used to append fields of one table to fields in another table)
2. Spatial Analyst (provides a range of spatial modeling and analysis features)
3. Raster Calculator (perform mathematical calculations, set up selection queries, etc.)
- Clip using Mask (cut out a piece of a layer using the border of another feature)
- Select by Attributes (uses structured query language (SQL) to define desired criteria)
- Conditional statements (controls the output value for a given cell by evaluating the cell true or false for a given statement)
4. Reclassify (changes the values in a raster)
5. Hydrology (allows modeling of flow of water from a DEM)
- Fill (creates raster of flow accumulation to each cell)
- Flow Direction (shows direction from each cell to its steepest downhill neighbor)
- Flow Accumulation (creates raster of total flow to each cell)
- Stream to Feature (converts linear stream raster to features representing the raster)
6. Euclidean Distance (calculates Euclidean distance to closest source for each cell)
7. Buffer (creates polygons for a specific distance around selected features)
8. Clip (cut out a piece of a feature class using one or more features)
9. Raster to Polygon (converts a raster dataset to multiple polygon features)
10. Export Selected Features (move selected features to a different location, often added as a layer)
11. Attribute Table (store information about a geographic object)
- Calculate Geometry (gives length, perimeter, coordinates, etc. of any field in table)
- Field Calculator (uses mathematical calculation to set value for a single cell or all values in a field)
- Statistics (calculates mean, max, min, etc. for given field)
- Add Field (adds a column to an attribute table)
12. Define Projection (assigns a specific coordinate system to a dataset or feature class)
13. Project Raster (transforms raster dataset from one projection to another)
14. Project (Feature) (changes coordinate system of input dataset to new coordinate system for output dataset)