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tutorial:vectorization [2013/10/01 16:44] leoame [Clean intersections] |
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| ====== Advanced Vectorization ====== | ====== Advanced Vectorization ====== | ||
| - | This page is dedicated to give some experience based tips to achieve a better and faster work. The following topics require a good knowledge of ToolMap and its functioning. | + | This topic relate all the strategies concerning the vectorization. |
| - | The strategies proposed can spare you a lot of time, but they require the use of the shortcuts otherwise it risks to actually become longer. | + | |
| ===== Homogenized drawing ===== | ===== Homogenized drawing ===== | ||
| - | If you want your final results to be consistent you should allways draw your lines at the same scale. In addition, to get fluid results your drawing scale shall be at least 10 time bigger as the original map. By doing so you will see nice and round lines instead of sharp edged segmented ones. | + | If you want your final results to be consistent you should allways draw your lines at the same scale. In addition, to get smooth results your drawing scale shall be at least 10 time bigger as the original map. By doing so you will see nice and round lines instead of sharp edged segmented ones. |
| exemple: for a 1:10'000 map digitize your lines at a 1:1'000 scale | exemple: for a 1:10'000 map digitize your lines at a 1:1'000 scale | ||
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| {{tutorial:tutorial-intersection1.png?nolink}} | {{tutorial:tutorial-intersection1.png?nolink}} | ||
| - | As you can see on the picture above, there is a lot of intersections totally ignored. Now draw the smaller features the same way you would do near the frame (i.e. wider than needed) and directly attribute them. | + | As you can see on the picture above, there is a lot of intersections totally ignored. Now draw the smaller features the same way you would do near the frame (i.e. wider than needed) and directly attribute them. Then: |
| - | => **Ctrl+i**: It automatically create the intersections and cut the lines. | + | => **Ctrl+I**: It automatically creates the intersections and cut the lines. |
| - | => **Shift + select**: It unselect the part I want to keep. | + | => **Shift + select**: Unselect the part you want to keep. |
| - | Now your selection is composed only by two superfluous lines which you can delete delete. | + | Now your selection is composed only by two superfluous lines you can delete. |
| {{tutorial:tutorial-intersection2.png?nolink}} | {{tutorial:tutorial-intersection2.png?nolink}} | ||