Working in QGIS
Description: A planting layout for a sustainable agriculture model inspired by the environmental conditions of Central New Mexico. Design priorities are drought tolerance, commercial yield and ecological design. The row sequence is A-B-C-B-A where row A is honey mesquite with four-wing saltbush, row B is prickly pear cactus and row C is desert wildflowers. The rows are parallel to the general direction of the contour.
Following a tutorial, I took a layer of roadway block for Washington DC, visualized the connectivity and built a network to find the shortest path between 2 points in the city.
Tutorial: Basic Network Visualization and Routing (QGIS3) — QGIS Tutorials and Tips
Following a tutorial, I identified suitable areas for development which are far from water, near to roads and not in a protected region.
Tutorial: Multi Criteria Overlay Analysis (QGIS3) — QGIS Tutorials and Tips
Following a tutorial, I created a wetlands map for each county in the state of Hawaii with the print layout Atlas.
Tutorial: Automating Map Creation with Print Layout Atlas (QGIS3) — QGIS Tutorials and Tips
Following a tutorial, I took several global vector layers and clipped them to the extent of Africa in a single batch command. I also merged the clipped layers into a single Geopackage file.
Tutorial: Batch Processing using Processing Framework (QGIS3) — QGIS Tutorials and Tips
Following a tutorial, I created a processing model to produce a density map by aggregating points over a global hexagonal grid.
Tutorial: Automating Complex Workflows using Processing Modeler (QGIS3) — QGIS Tutorials and Tips
Following a tutorial, I used a point layer of depth measurements taken by a depth sounder at a lake to create an elevation relief map and contours.
This map was begun by following a tutorial, then extended. The tutorial was to use a change assessment dataset to identify urban growth patterns in the city of Johannesburg from 2014 to 2018. Once done, I added OSM features including major highways and rails. I calculated the raster area for the 3 classes and added a pie chart. Finally, I designed the print layout.
Following a tutorial, I fixed a geometry error in a state boundary layer. While attempting to run the ‘topological coloring’ algorithm, I encountered an error. I ran vector geometry>check validity to find the root cause. There was a ring self-intersection, which happens when a geometry touches itself and generates a ring. I used the vertex tool to edit the layer and fixed the geometry.
Handling Invalid Geometries (QGIS3) — QGIS Tutorials and Tips
Following a tutorial, I worked with a dataset of crime locations in Surrey, UK and created a heatmap to visualize regions with high density of crime. I created a new attribute with a higher value for violent crimes, in order to give violent crimes relatively more weight in the heatmap.
Tutorial: Creating Heatmaps (QGIS3) — QGIS Tutorials and Tips