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1762006720 JUST ONE MORE ABSTRACTION LAYER BRO JUST ONE MORE ABSTRACTION LAYER BRO JUST ONE MORE ABSTRACTION LAYER BRO JUST ONE MORE ABSTRACTION LAYER BRO I SWEAR BRO JUST ONE MORE, I SWEAR
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QGIS + Fields2Cover Tutorial on how to export polygons in QGIS into geojson for later use in Fields2Cover ## Create a polygon layer Open QGIS. Create the database In the left side bar, right-click “SpatiaLite” and select “Create Database…” You will be asked to save the database in a `.sqlite` file somewhere on your disk. In my case I called it `tutorial.sqlite`. Create a new table Right-click on the generated database and select “New Table…” Create the following schema: Custom schema Save with “OK” Double click on the newly created table to add it to your layers. Add other layers below (eg: OpenStreetMap, orthophoto providers, etc…). In the top menu, go to “View” -> “Toolbars” and enable “Advanced Digitizing Toolbar” How to enable ring toolbar It should look like: Overview of the interface with map ## How to draw In the layer panel, select the project layer created previously and then press on the pencil icon in the toolbar Edit mode Now you can add your outer perimeter by pressing the “Add Polygon Feature” icon. How to add polygons The polygon will obscure everything underneath making it hard to see the obstacles. We can fix this by changing the opacity of the layer. Right click on the layer and select “Properties” Fix opacity In the new window, use the navigation panel to select “Symbology”. Open the “Later Rendering” menu at the bottom and change the opacity. Save with “OK”. Opacity Settings In the toolbars, press the “Select Feature” and click on your previosly created area. It will change color, usually into yellow. How to select polygons Now we can add the obstacles: select the “Add Ring” from the toolbar and trace the shape of the obstacles. How to select obstacles After being done with it: exit the edit mode by pressing the pencil icon again and save your obect database by pressing the Floppy Disk icon 💾. Save icon To export your file: Right click on the object layer and go to “Export” -> “Save Feature As” Menu navigation for export In the new window: * Select GeoJson as the format * Pick a destination for the exported file * De-select the optional integer field * De-select “Persist Layer Metadata” Export settings Now that you have a “.json” file you can import in F2C with c++ 1 2 3 | F2CFields fields; f2c::Parser::importJson(std::string(DATA_PATH) + "tutorial.geojson", fields); ---|--- Full example Final result: UTM Coordinates EPSG:6708
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