# NCSU GIS/MEA582:Geospatial Modeling and Analysis

## Assignments: in class practice and homework

For formal requirements go to Course logistics. This course is using GRASS GIS and ArcGIS and dedicated datasets, see Course logistics for details.

### 2. Geospatial data models and visualization

#### 2.B. Data display and visualization

• Approach: GRASS solution, ArcGIS solution
• Screen captures for 3D visualization with 3D view (wxNVIZ) in GRASS GIS 6.4.3RC2 (similar to GRASS GIS 7)
• Homework: Prepare paper on geospatial data models and their conversions (changing raster resolution, vector data type, raster to vector and vector to raster) issues, methods, results. Also describe methods and results for graphical representation of continuous and discrete geospatial data. Demonstrate the use of multiple surfaces for visual analysis of the difference between the bare ground surface and multiple return surface with vegetation.

### 3. Geospatial Analysis

#### 3.B. Buffers, cost surfaces, least cost path

• Approach: GRASS solution, ArcGIS solution
• Homework: Prepare a paper on applications of global and zonal statistics, neighborhood operations and map algebra for analysis of continuous and discrete geospatial data. In this paper also explain and demonstrate the use of buffers and cost surfaces for solving proximity problems. Comment on specific results for the study area and given tasks.

### 5. Geomorphometry

#### 5.B. Spatial and Temporal Terrain analysis

• Approach: GRASS solution, ArcGIS solution
• Homework: Prepare a paper on properties of lidar data and on computing topographic parameters from digital elevation models. Discuss how the topographic analysis methods and types of DEM influence the result. Describe results of elevation time series analysis.

### 6. Viewshed, solar potential analysis

• Approach: GRASS solution, ArcGIS solution
• Homework: Prepare a paper on the results of viewshed computation and solar irradiation mapping. Note that this is a single assignment paper.

### 7. Hydrology and modeling geospatial processes

#### 7.B. Modeling Geospatial Processes: Hydrologic and erosion modeling

• Brief theoretical background (equations used to write map algebra expressions)
• Approach: GRASS solution, ArcGIS solution
• Optional: process based hydrologic modeling using path sampling method: SIMWE
• GRASS solution: SIMWE
• Homework: Prepare a paper where you compare different methods for flowrouting and watershed analysis, explain and discuss impact of model parameters and land use scenarios on spatial pattern and magnitude of erosion as simulated by simple GIS-based models.