GIS in QGIS 3 for beginners

Explore origins of coordinated systems and geodesy as Erath Testiness of Sirene measures Earth's circumference using equinox shadow, a 7°12′ angle between Sirene and Alexandria, and an 800 km baseline.

Explore QGIS versions and downloads, choosing between the latest 3.6 and the long-term 3.4, understanding major and minor changes, and installing 64-bit Windows or 32-bit variants.

Install QGIS 3.6 with the wizard and destination folder. Then adjust control panel region settings to set the decimal symbol to dot for Python-based workflows.

Select the appropriate QGIS desktop setup for beginners by reviewing installed software, skip GRASS and SAGA, and default to Google Desktop 3.6 for everyday GIS work.

Use the information tool to identify coal and diesel plants, then remove them with the select tool, ending with 38 objects that do not use coal or diesel.

Merge adjoining objects in the active layer by selecting features and using the merge tool; the first object's name is kept automatically, and you can rename the new object.

Master the simple style in qgis 3 by adjusting fill, borders, and transparency for polygon data, and apply palettes and layer rendering for counties and boundaries.

Apply style classification in QGIS by using the categorized description method to assign colors to land cover types from the USGS Land Cover Gap Analysis Program, with single symbol rendering.

Reproject vector and raster data into a new coordinate reference system by exporting as a different file and selecting EPSG 32611 (utm zone 11).

Discover how to style rasters in QGIS using single-band pseudo color, adjust color ramps, invert palettes, and set min/max values to reveal terrain with brown to green hues.

Georeference raster data in QGIS 3 using the georeferencer tool, assign a target CRS such as WGS 84 UTM zone 11, and align with control points.

Georeference raster data in QGIS by coordinates using a UTM Zone 11 WGS 84 CRS, align wind speed rasters with four GCP points, and ensure coordinates to minimize conversion errors.

Learn to use the union tool in QGIS to merge multiple vector layers into one, combining aquatic conservation areas, NPS boundaries, and USFS areas, while handling invalid geometry.

learn how to create a 50-kilometer buffer around census transportation routes in qgis to map areas within reach of the main roads, handling distance units and coordinate systems.

Compare clip and intersection tools in QGIS 3 for beginners by intersecting roads with oil depots to show how clip preserves clip attributes while intersection merges attributes from both layers.

Learn to create a new layer in QGIS 3 by choosing shapefile or geopackage, set geometry to polygon, use utf-8 encoding and wgc 84, and save as wind locations.

Enter edit mode, use the add tools to draw polygons, lines, or points, correct geometry errors with the delete key, and set an ID to create the new layer object.

Explore attributes and database concepts for GIS. Learn about relational tables, records, keys, and data types to support spatial information systems.

Calculate area, length, and perimeter using the field calculator, updating existing fields or creating new ones, and convert results to kilometers for polygon areas and line lengths.

Learn to apply the if conditional in QGIS 3 to compute perimeters only for features with area >= 1000 kilometers, by using the calculator to create a new perimeter attribute.

Copy your QGIS table to Excel by selecting all, copying, and pasting, then clean up columns by removing geometry and empty rows, and create a pivot table to summarize area.

Extract vertices from vector layers in QGIS to obtain x and y coordinates for border points, then export coordinates to Excel for multiple locations.

Create voronoi polygons from stations to interpolate mean annual precipitation across an area, linking each polygon to its central station and displaying results with a blue graduated color scheme.