Creating grid following points in QGIS?Creating grid polygons from coordinates using R or PythonQGIS: calculate distance between pointsCreate spatial polygon grid from spatial points in RDraw a spatial grid with the lat/longs at the center of the grid using R
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Creating grid following points in QGIS?
Creating grid polygons from coordinates using R or PythonQGIS: calculate distance between pointsCreate spatial polygon grid from spatial points in RDraw a spatial grid with the lat/longs at the center of the grid using R
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I am working with a set of coordinates from a csv file that creates a grid (of points) in QGIS. There is an id attribute along with the X and Y coordinates for each point.
I need to work with a polygon grid made out of these points. Using the grid tool doesn't work as there is a slight rotation to the points:
I need to create a grid that has a point in each intersection of lines and would look like the following grid I drew by hand:
I looked everywhere for a way of doing so, I found this tutorial but it didn't work for me.
qgis coordinates vector-grid
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
add a comment
|
I am working with a set of coordinates from a csv file that creates a grid (of points) in QGIS. There is an id attribute along with the X and Y coordinates for each point.
I need to work with a polygon grid made out of these points. Using the grid tool doesn't work as there is a slight rotation to the points:
I need to create a grid that has a point in each intersection of lines and would look like the following grid I drew by hand:
I looked everywhere for a way of doing so, I found this tutorial but it didn't work for me.
qgis coordinates vector-grid
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
Tilting may be due to different CRS. Have you ruled this out?
– Erik
Sep 18 at 13:53
Yes I checked that first actually, project and layers are all in the same crs.
– I.M.
Sep 18 at 14:03
add a comment
|
I am working with a set of coordinates from a csv file that creates a grid (of points) in QGIS. There is an id attribute along with the X and Y coordinates for each point.
I need to work with a polygon grid made out of these points. Using the grid tool doesn't work as there is a slight rotation to the points:
I need to create a grid that has a point in each intersection of lines and would look like the following grid I drew by hand:
I looked everywhere for a way of doing so, I found this tutorial but it didn't work for me.
qgis coordinates vector-grid
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
I am working with a set of coordinates from a csv file that creates a grid (of points) in QGIS. There is an id attribute along with the X and Y coordinates for each point.
I need to work with a polygon grid made out of these points. Using the grid tool doesn't work as there is a slight rotation to the points:
I need to create a grid that has a point in each intersection of lines and would look like the following grid I drew by hand:
I looked everywhere for a way of doing so, I found this tutorial but it didn't work for me.
qgis coordinates vector-grid
qgis coordinates vector-grid
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
edited Sep 19 at 7:22
PolyGeo♦
58.5k17 gold badges89 silver badges264 bronze badges
58.5k17 gold badges89 silver badges264 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
asked Sep 18 at 12:26
I.M.I.M.
534 bronze badges
534 bronze badges
Tilting may be due to different CRS. Have you ruled this out?
– Erik
Sep 18 at 13:53
Yes I checked that first actually, project and layers are all in the same crs.
– I.M.
Sep 18 at 14:03
add a comment
|
Tilting may be due to different CRS. Have you ruled this out?
– Erik
Sep 18 at 13:53
Yes I checked that first actually, project and layers are all in the same crs.
– I.M.
Sep 18 at 14:03
Tilting may be due to different CRS. Have you ruled this out?
– Erik
Sep 18 at 13:53
Tilting may be due to different CRS. Have you ruled this out?
– Erik
Sep 18 at 13:53
Yes I checked that first actually, project and layers are all in the same crs.
– I.M.
Sep 18 at 14:03
Yes I checked that first actually, project and layers are all in the same crs.
– I.M.
Sep 18 at 14:03
add a comment
|
2 Answers
2
active
oldest
votes
This is a bit of a workaround in QGIS 3.8 and requires that the points are separated by a uniform distance (bit it looks like it from your screenshots).
- Create a grid with the same spacing and dimensions as your points - somewhere in the vicinity with Processing Toolbox --> Create grid
Next, enable the editing mode on the new Grid grid. Make sure that the Advanced Digitizing Toolbar is turned on (View --> Toolbars --> Advanced Digitizing Toolbar.
Make sure snapping is enabled: Project --> Snapping Options...
Select all elements of your grid.
Select the move tool and move one edge of the grid to the corner point of your points:
Choose the Rotate Feature button. Zoom a lot into that corner point which now fits with the grid. While holding CTRL click on that corner point. You will see a little plus appear to show that this is the rotation point. You need to zoom a lot, since currently the click is not snapping.
Now go to the other edge of the points - and with left click start the rotation of your grid there. Zoom in and make sure that you fit the grid well to the points.
Since the rotation does not benefit from the snapping function, you might have a few mm discrepancy, but it should probably be acceptable.
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
add a comment
|
- Generate Voronoi Polygons around your points using Processing Toolbox - Vector Geometry-Voronoi Polygons.
- Use Vector - Geometry Tools - Extract Vertices to get the intersections of the newly created Voronoi Polygons.
- Creating Voronoi Polygons around the vertices.
The resulting polygons will have your original points located at their intersections regardless of the slight rotation of your original points.
The only 'Gotchas' here is that the first set of Voronoi you create will not encompass your outer most points. You could add an extra ring of points around your existing dataset and edit the final results.
Your data will also need to be in a projected coordinate reference system for the Voronoi creations.
Below is a screen shot of the first set of Voronoi polygons that highlights the problem with the outer most points.
And here is a screen shot of the second set of Voronoi polygons with the error compounded. If you are able to create the newer outer ring of points, and attribute them as such you could finish by selecting those points, using that selection to select the outer most polygons, and then delete the selection.
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
add a comment
|
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2 Answers
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2 Answers
2
active
oldest
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votes
This is a bit of a workaround in QGIS 3.8 and requires that the points are separated by a uniform distance (bit it looks like it from your screenshots).
- Create a grid with the same spacing and dimensions as your points - somewhere in the vicinity with Processing Toolbox --> Create grid
Next, enable the editing mode on the new Grid grid. Make sure that the Advanced Digitizing Toolbar is turned on (View --> Toolbars --> Advanced Digitizing Toolbar.
Make sure snapping is enabled: Project --> Snapping Options...
Select all elements of your grid.
Select the move tool and move one edge of the grid to the corner point of your points:
Choose the Rotate Feature button. Zoom a lot into that corner point which now fits with the grid. While holding CTRL click on that corner point. You will see a little plus appear to show that this is the rotation point. You need to zoom a lot, since currently the click is not snapping.
Now go to the other edge of the points - and with left click start the rotation of your grid there. Zoom in and make sure that you fit the grid well to the points.
Since the rotation does not benefit from the snapping function, you might have a few mm discrepancy, but it should probably be acceptable.
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
add a comment
|
This is a bit of a workaround in QGIS 3.8 and requires that the points are separated by a uniform distance (bit it looks like it from your screenshots).
- Create a grid with the same spacing and dimensions as your points - somewhere in the vicinity with Processing Toolbox --> Create grid
Next, enable the editing mode on the new Grid grid. Make sure that the Advanced Digitizing Toolbar is turned on (View --> Toolbars --> Advanced Digitizing Toolbar.
Make sure snapping is enabled: Project --> Snapping Options...
Select all elements of your grid.
Select the move tool and move one edge of the grid to the corner point of your points:
Choose the Rotate Feature button. Zoom a lot into that corner point which now fits with the grid. While holding CTRL click on that corner point. You will see a little plus appear to show that this is the rotation point. You need to zoom a lot, since currently the click is not snapping.
Now go to the other edge of the points - and with left click start the rotation of your grid there. Zoom in and make sure that you fit the grid well to the points.
Since the rotation does not benefit from the snapping function, you might have a few mm discrepancy, but it should probably be acceptable.
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
add a comment
|
This is a bit of a workaround in QGIS 3.8 and requires that the points are separated by a uniform distance (bit it looks like it from your screenshots).
- Create a grid with the same spacing and dimensions as your points - somewhere in the vicinity with Processing Toolbox --> Create grid
Next, enable the editing mode on the new Grid grid. Make sure that the Advanced Digitizing Toolbar is turned on (View --> Toolbars --> Advanced Digitizing Toolbar.
Make sure snapping is enabled: Project --> Snapping Options...
Select all elements of your grid.
Select the move tool and move one edge of the grid to the corner point of your points:
Choose the Rotate Feature button. Zoom a lot into that corner point which now fits with the grid. While holding CTRL click on that corner point. You will see a little plus appear to show that this is the rotation point. You need to zoom a lot, since currently the click is not snapping.
Now go to the other edge of the points - and with left click start the rotation of your grid there. Zoom in and make sure that you fit the grid well to the points.
Since the rotation does not benefit from the snapping function, you might have a few mm discrepancy, but it should probably be acceptable.
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
This is a bit of a workaround in QGIS 3.8 and requires that the points are separated by a uniform distance (bit it looks like it from your screenshots).
- Create a grid with the same spacing and dimensions as your points - somewhere in the vicinity with Processing Toolbox --> Create grid
Next, enable the editing mode on the new Grid grid. Make sure that the Advanced Digitizing Toolbar is turned on (View --> Toolbars --> Advanced Digitizing Toolbar.
Make sure snapping is enabled: Project --> Snapping Options...
Select all elements of your grid.
Select the move tool and move one edge of the grid to the corner point of your points:
Choose the Rotate Feature button. Zoom a lot into that corner point which now fits with the grid. While holding CTRL click on that corner point. You will see a little plus appear to show that this is the rotation point. You need to zoom a lot, since currently the click is not snapping.
Now go to the other edge of the points - and with left click start the rotation of your grid there. Zoom in and make sure that you fit the grid well to the points.
Since the rotation does not benefit from the snapping function, you might have a few mm discrepancy, but it should probably be acceptable.
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
answered Sep 18 at 13:21
miln40miln40
7253 silver badges17 bronze badges
7253 silver badges17 bronze badges
add a comment
|
add a comment
|
- Generate Voronoi Polygons around your points using Processing Toolbox - Vector Geometry-Voronoi Polygons.
- Use Vector - Geometry Tools - Extract Vertices to get the intersections of the newly created Voronoi Polygons.
- Creating Voronoi Polygons around the vertices.
The resulting polygons will have your original points located at their intersections regardless of the slight rotation of your original points.
The only 'Gotchas' here is that the first set of Voronoi you create will not encompass your outer most points. You could add an extra ring of points around your existing dataset and edit the final results.
Your data will also need to be in a projected coordinate reference system for the Voronoi creations.
Below is a screen shot of the first set of Voronoi polygons that highlights the problem with the outer most points.
And here is a screen shot of the second set of Voronoi polygons with the error compounded. If you are able to create the newer outer ring of points, and attribute them as such you could finish by selecting those points, using that selection to select the outer most polygons, and then delete the selection.
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
add a comment
|
- Generate Voronoi Polygons around your points using Processing Toolbox - Vector Geometry-Voronoi Polygons.
- Use Vector - Geometry Tools - Extract Vertices to get the intersections of the newly created Voronoi Polygons.
- Creating Voronoi Polygons around the vertices.
The resulting polygons will have your original points located at their intersections regardless of the slight rotation of your original points.
The only 'Gotchas' here is that the first set of Voronoi you create will not encompass your outer most points. You could add an extra ring of points around your existing dataset and edit the final results.
Your data will also need to be in a projected coordinate reference system for the Voronoi creations.
Below is a screen shot of the first set of Voronoi polygons that highlights the problem with the outer most points.
And here is a screen shot of the second set of Voronoi polygons with the error compounded. If you are able to create the newer outer ring of points, and attribute them as such you could finish by selecting those points, using that selection to select the outer most polygons, and then delete the selection.
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
add a comment
|
- Generate Voronoi Polygons around your points using Processing Toolbox - Vector Geometry-Voronoi Polygons.
- Use Vector - Geometry Tools - Extract Vertices to get the intersections of the newly created Voronoi Polygons.
- Creating Voronoi Polygons around the vertices.
The resulting polygons will have your original points located at their intersections regardless of the slight rotation of your original points.
The only 'Gotchas' here is that the first set of Voronoi you create will not encompass your outer most points. You could add an extra ring of points around your existing dataset and edit the final results.
Your data will also need to be in a projected coordinate reference system for the Voronoi creations.
Below is a screen shot of the first set of Voronoi polygons that highlights the problem with the outer most points.
And here is a screen shot of the second set of Voronoi polygons with the error compounded. If you are able to create the newer outer ring of points, and attribute them as such you could finish by selecting those points, using that selection to select the outer most polygons, and then delete the selection.
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
- Generate Voronoi Polygons around your points using Processing Toolbox - Vector Geometry-Voronoi Polygons.
- Use Vector - Geometry Tools - Extract Vertices to get the intersections of the newly created Voronoi Polygons.
- Creating Voronoi Polygons around the vertices.
The resulting polygons will have your original points located at their intersections regardless of the slight rotation of your original points.
The only 'Gotchas' here is that the first set of Voronoi you create will not encompass your outer most points. You could add an extra ring of points around your existing dataset and edit the final results.
Your data will also need to be in a projected coordinate reference system for the Voronoi creations.
Below is a screen shot of the first set of Voronoi polygons that highlights the problem with the outer most points.
And here is a screen shot of the second set of Voronoi polygons with the error compounded. If you are able to create the newer outer ring of points, and attribute them as such you could finish by selecting those points, using that selection to select the outer most polygons, and then delete the selection.
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
answered Sep 18 at 15:02
GBGGBG
3,7605 silver badges19 bronze badges
3,7605 silver badges19 bronze badges
add a comment
|
add a comment
|
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Tilting may be due to different CRS. Have you ruled this out?
– Erik
Sep 18 at 13:53
Yes I checked that first actually, project and layers are all in the same crs.
– I.M.
Sep 18 at 14:03