Select features: Edit>Select>Select Features by [Value, Expression, etc.]. To Edit>Select>Select Features by Expression, use this example: “FACILITY_N” LIKE ‘%Reston Pkwy%’ AND “TREATMENT_” = ‘Trail’ OR “FACILITY_N” LIKE ‘%Lawyers Rd Trail%’ OR “FACILITY_N” LIKE ‘%West Ox Rd Trail%’ where LIKE means contains. To Deselect features, hold the Cmd key and use Select Features by Freehand button. Other examples” “FACILITY_N” LIKE ‘%Gallows Rd Trail%’ OR “FACILITY_N” LIKE ‘%Route 50 Trail%’ OR “FACILITY_N” LIKE ‘%Route 50 Path%’ OR “FACILITY_N” LIKE ‘%Fairfax County Parkway Trail%’ OR “FACILITY_N” LIKE ‘%Braddock Road Trail%’ OR “FACILITY_N” LIKE ‘%Braddock Rd Trail%’ or “FACILITY_N” LIKE ‘%Braddock Rd Sidewalk%’ OR “FULLNAME” LIKE ‘%I66 WB%’ OR “FACILITY_N” LIKE ‘%Lorton Rd%’ AND “TREATMENT_” LIKE ‘%Trail%’ OR “FACILITY_N” LIKE ‘%Cross County Trail%’
To delete a selected feature, select the layer, right-click and select Toggle Editing, then use the Delete Selected icon in the toolbar. The Toggle Editing again.
To change color of selection and background: QGIS>Preferences>Canvas & Legends – Applies to new projects.
To create a new layer from a selection: Right click on the layer with the selected features. Choose: Export>Save Selected Features As... use GeoPackage format OR Select the features and then use Edit>Copy and then Paste Features As>New Vector Layer (or a Scratch layer).
Transfer Strava data to QGIS – Navigate to one of your Activity pages and from the more (ellipses) menu, select “Export GPX“. In QGIS use Layer>Add Layer>Add GPX Layer… [This may not work: OR if there are multiple gpx files, each segment (trkseg) can be combined into a single file that can be imported. Append the segments <trkseg>segment info</trkseg> then use the plugin GPX Segment Tools.]
Import multiple GPX files: Plugins>GPX Segment Tools>select the GPX files to be loaded. Then merge using the Processing Toolbox as outlined below.
To merge two layers – Use the Processing Toolbox>Vector general>Merge vector layers. Select the Input layers by clicking on the box next to each layer. Then select the Merged layer name and click Run. This will create a temporary layer. To save the merged layer, click on the rectangular box with legs to the right of the layer and fill out the form.
To check or uncheck multiple layers, select the layers, View>Layer Visibility>Toggle Selected Layers
To add geotagged photos, View>Panels>Processing Toolbox>Vector Creation>Import geotagged photos. To retain, save the scratch layer by right-clicking on the temporary layer name (or click on the rectangular box with legs). OR better to Save to GeoPackage by clicking on … next to Photos [optional]. To view the photos, open photo layer properties>Display. In the box HTML Map Tip enter an img tag such as <img src=”file:///[% photo %]” width=”350″ height=”250″>. Turn on View>Show Map Tips and when hovering over the photo (slight delay in display time. Display time can be changed using Settings>Options>Canvas & Legend>Map Tips Delay. Default is 850 ms. Can be 0 or maybe 10.), the photo will appear.
Creating point layer: Layer>Create Layer>New GeoPackage Layer. Geometry Type: Point. Created 3 attribute fields, photo, filename, directory. To digitize points, select the layer, toggle editing then use Edit>Add Point Feature. Then entered the data for the 3 fields based on the imported geotagged data OxRdPhotos. Used the above <img src> info in paragraph above.