Resample/Increase the resolution of Digital Elevation Model by QGIS [closed] The 2019 Stack Overflow Developer Survey Results Are InCompare two Digital Elevation Model (DEM)Advantage of Digital Elevation Model (DEM) in Agriculture?Can I prevent QGIS raster clipper from changing output cell/pixel size?Working with GB SRTM Digital Elevation Model (DEM) 90mDigital Elevation Model Resolutionline from min to max of a digital elevation modelCombine digital elevation model (DEM) with point layer (QGIS)Creating Data Elevation Model from two sourcesGrid size of a Digital Elevation Model developed from topographic surveyed elevation contour line?Creating Digital Elevation Model from Contour Data using QGIS?
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Resample/Increase the resolution of Digital Elevation Model by QGIS [closed]
The 2019 Stack Overflow Developer Survey Results Are InCompare two Digital Elevation Model (DEM)Advantage of Digital Elevation Model (DEM) in Agriculture?Can I prevent QGIS raster clipper from changing output cell/pixel size?Working with GB SRTM Digital Elevation Model (DEM) 90mDigital Elevation Model Resolutionline from min to max of a digital elevation modelCombine digital elevation model (DEM) with point layer (QGIS)Creating Data Elevation Model from two sourcesGrid size of a Digital Elevation Model developed from topographic surveyed elevation contour line?Creating Digital Elevation Model from Contour Data using QGIS?
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I have a DEM of 5m pixel. I wonder is it okay to convert it to 2m pixel? How to do that using QGIS?
And what would happen to the original data, I mean the accuracy? Would it be reliable?
qgis raster dem
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
asked Apr 6 at 2:12
SummerSummer
286
closed as too broad by Spacedman, HDunn, Andre Silva, wetland, Vince Apr 6 at 23:30
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |
I have a DEM of 5m pixel. I wonder is it okay to convert it to 2m pixel? How to do that using QGIS?
And what would happen to the original data, I mean the accuracy? Would it be reliable?
qgis raster dem
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
asked Apr 6 at 2:12
SummerSummer
286
closed as too broad by Spacedman, HDunn, Andre Silva, wetland, Vince Apr 6 at 23:30
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
1
What do you mean by "is it okay"? Nobody is going to arrest you for doing it. What do you mean by "reliable"? All data is unreliable in some sense. Have you looked at the QGIS raster processing options for doing this?
– Spacedman
Apr 6 at 8:48
add a comment |
I have a DEM of 5m pixel. I wonder is it okay to convert it to 2m pixel? How to do that using QGIS?
And what would happen to the original data, I mean the accuracy? Would it be reliable?
qgis raster dem
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
asked Apr 6 at 2:12
SummerSummer
286
I have a DEM of 5m pixel. I wonder is it okay to convert it to 2m pixel? How to do that using QGIS?
And what would happen to the original data, I mean the accuracy? Would it be reliable?
qgis raster dem
qgis raster dem
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
asked Apr 6 at 2:12
SummerSummer
286
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
asked Apr 6 at 2:12
SummerSummer
286
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
edited Apr 6 at 10:21
Kadir Şahbaz
4,63721531
4,63721531
asked Apr 6 at 2:12
SummerSummer
286
asked Apr 6 at 2:12
SummerSummer
286
asked Apr 6 at 2:12
SummerSummer
286
286
closed as too broad by Spacedman, HDunn, Andre Silva, wetland, Vince Apr 6 at 23:30
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as too broad by Spacedman, HDunn, Andre Silva, wetland, Vince Apr 6 at 23:30
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
1
What do you mean by "is it okay"? Nobody is going to arrest you for doing it. What do you mean by "reliable"? All data is unreliable in some sense. Have you looked at the QGIS raster processing options for doing this?
– Spacedman
Apr 6 at 8:48
add a comment |
1
What do you mean by "is it okay"? Nobody is going to arrest you for doing it. What do you mean by "reliable"? All data is unreliable in some sense. Have you looked at the QGIS raster processing options for doing this?
– Spacedman
Apr 6 at 8:48
1
1
What do you mean by "is it okay"? Nobody is going to arrest you for doing it. What do you mean by "reliable"? All data is unreliable in some sense. Have you looked at the QGIS raster processing options for doing this?
– Spacedman
Apr 6 at 8:48
What do you mean by "is it okay"? Nobody is going to arrest you for doing it. What do you mean by "reliable"? All data is unreliable in some sense. Have you looked at the QGIS raster processing options for doing this?
– Spacedman
Apr 6 at 8:48
add a comment |
1 Answer
1
active
oldest
votes
You just right click the layer and choose Export > Save As to do that in QGIS 3.x, define the extend as current layer extend and define resolution.
No problem resampling the image. But you can't increase the accuracy by increasing the resolution. Because the spatial resolution of the source DEM is 5m after all. In that case you just increase the number of pixels in the same area.
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
Then what would happen to the image after resampling in in terms of pixel value and resolution? I tried on an image and noticed that the value for the same point did change.
– Summer
Apr 6 at 12:08
Value may change because of interpolation used. But the accuracy doesn't increase. But the opposite is true. If you convert DEM 2m to DEM 5m, the accuracy decreases.
– Kadir Şahbaz
Apr 6 at 12:20
Think of a picture with 1000x1000 pixels. Changing the size into 2000x2000 doesn't increase the quality of the picture.
– Kadir Şahbaz
Apr 6 at 12:32
@Summer, the value has changed (probably just on some pixels) because 5m is not a multiple of 2m, so pixels won't align exactly among rasters. If you change resolution to 2,5m, 1m, etc, then all pixels should have same values.
– Andre Silva
Apr 7 at 0:32
1
@Summer, almost that, except that each 5m pixel becomes four 2.5m pixels with the same value of the 5m pixel (think in the second dimension).
– Andre Silva
Apr 7 at 0:58
|
show 1 more comment
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You just right click the layer and choose Export > Save As to do that in QGIS 3.x, define the extend as current layer extend and define resolution.
No problem resampling the image. But you can't increase the accuracy by increasing the resolution. Because the spatial resolution of the source DEM is 5m after all. In that case you just increase the number of pixels in the same area.
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
Then what would happen to the image after resampling in in terms of pixel value and resolution? I tried on an image and noticed that the value for the same point did change.
– Summer
Apr 6 at 12:08
Value may change because of interpolation used. But the accuracy doesn't increase. But the opposite is true. If you convert DEM 2m to DEM 5m, the accuracy decreases.
– Kadir Şahbaz
Apr 6 at 12:20
Think of a picture with 1000x1000 pixels. Changing the size into 2000x2000 doesn't increase the quality of the picture.
– Kadir Şahbaz
Apr 6 at 12:32
@Summer, the value has changed (probably just on some pixels) because 5m is not a multiple of 2m, so pixels won't align exactly among rasters. If you change resolution to 2,5m, 1m, etc, then all pixels should have same values.
– Andre Silva
Apr 7 at 0:32
1
@Summer, almost that, except that each 5m pixel becomes four 2.5m pixels with the same value of the 5m pixel (think in the second dimension).
– Andre Silva
Apr 7 at 0:58
|
show 1 more comment
You just right click the layer and choose Export > Save As to do that in QGIS 3.x, define the extend as current layer extend and define resolution.
No problem resampling the image. But you can't increase the accuracy by increasing the resolution. Because the spatial resolution of the source DEM is 5m after all. In that case you just increase the number of pixels in the same area.
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
Then what would happen to the image after resampling in in terms of pixel value and resolution? I tried on an image and noticed that the value for the same point did change.
– Summer
Apr 6 at 12:08
Value may change because of interpolation used. But the accuracy doesn't increase. But the opposite is true. If you convert DEM 2m to DEM 5m, the accuracy decreases.
– Kadir Şahbaz
Apr 6 at 12:20
Think of a picture with 1000x1000 pixels. Changing the size into 2000x2000 doesn't increase the quality of the picture.
– Kadir Şahbaz
Apr 6 at 12:32
@Summer, the value has changed (probably just on some pixels) because 5m is not a multiple of 2m, so pixels won't align exactly among rasters. If you change resolution to 2,5m, 1m, etc, then all pixels should have same values.
– Andre Silva
Apr 7 at 0:32
1
@Summer, almost that, except that each 5m pixel becomes four 2.5m pixels with the same value of the 5m pixel (think in the second dimension).
– Andre Silva
Apr 7 at 0:58
|
show 1 more comment
You just right click the layer and choose Export > Save As to do that in QGIS 3.x, define the extend as current layer extend and define resolution.
No problem resampling the image. But you can't increase the accuracy by increasing the resolution. Because the spatial resolution of the source DEM is 5m after all. In that case you just increase the number of pixels in the same area.
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
You just right click the layer and choose Export > Save As to do that in QGIS 3.x, define the extend as current layer extend and define resolution.
No problem resampling the image. But you can't increase the accuracy by increasing the resolution. Because the spatial resolution of the source DEM is 5m after all. In that case you just increase the number of pixels in the same area.
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
answered Apr 6 at 10:20
Kadir ŞahbazKadir Şahbaz
4,63721531
4,63721531
Then what would happen to the image after resampling in in terms of pixel value and resolution? I tried on an image and noticed that the value for the same point did change.
– Summer
Apr 6 at 12:08
Value may change because of interpolation used. But the accuracy doesn't increase. But the opposite is true. If you convert DEM 2m to DEM 5m, the accuracy decreases.
– Kadir Şahbaz
Apr 6 at 12:20
Think of a picture with 1000x1000 pixels. Changing the size into 2000x2000 doesn't increase the quality of the picture.
– Kadir Şahbaz
Apr 6 at 12:32
@Summer, the value has changed (probably just on some pixels) because 5m is not a multiple of 2m, so pixels won't align exactly among rasters. If you change resolution to 2,5m, 1m, etc, then all pixels should have same values.
– Andre Silva
Apr 7 at 0:32
1
@Summer, almost that, except that each 5m pixel becomes four 2.5m pixels with the same value of the 5m pixel (think in the second dimension).
– Andre Silva
Apr 7 at 0:58
|
show 1 more comment
Then what would happen to the image after resampling in in terms of pixel value and resolution? I tried on an image and noticed that the value for the same point did change.
– Summer
Apr 6 at 12:08
Value may change because of interpolation used. But the accuracy doesn't increase. But the opposite is true. If you convert DEM 2m to DEM 5m, the accuracy decreases.
– Kadir Şahbaz
Apr 6 at 12:20
Think of a picture with 1000x1000 pixels. Changing the size into 2000x2000 doesn't increase the quality of the picture.
– Kadir Şahbaz
Apr 6 at 12:32
@Summer, the value has changed (probably just on some pixels) because 5m is not a multiple of 2m, so pixels won't align exactly among rasters. If you change resolution to 2,5m, 1m, etc, then all pixels should have same values.
– Andre Silva
Apr 7 at 0:32
1
@Summer, almost that, except that each 5m pixel becomes four 2.5m pixels with the same value of the 5m pixel (think in the second dimension).
– Andre Silva
Apr 7 at 0:58
Then what would happen to the image after resampling in in terms of pixel value and resolution? I tried on an image and noticed that the value for the same point did change.
– Summer
Apr 6 at 12:08
Then what would happen to the image after resampling in in terms of pixel value and resolution? I tried on an image and noticed that the value for the same point did change.
– Summer
Apr 6 at 12:08
Value may change because of interpolation used. But the accuracy doesn't increase. But the opposite is true. If you convert DEM 2m to DEM 5m, the accuracy decreases.
– Kadir Şahbaz
Apr 6 at 12:20
Value may change because of interpolation used. But the accuracy doesn't increase. But the opposite is true. If you convert DEM 2m to DEM 5m, the accuracy decreases.
– Kadir Şahbaz
Apr 6 at 12:20
Think of a picture with 1000x1000 pixels. Changing the size into 2000x2000 doesn't increase the quality of the picture.
– Kadir Şahbaz
Apr 6 at 12:32
Think of a picture with 1000x1000 pixels. Changing the size into 2000x2000 doesn't increase the quality of the picture.
– Kadir Şahbaz
Apr 6 at 12:32
@Summer, the value has changed (probably just on some pixels) because 5m is not a multiple of 2m, so pixels won't align exactly among rasters. If you change resolution to 2,5m, 1m, etc, then all pixels should have same values.
– Andre Silva
Apr 7 at 0:32
@Summer, the value has changed (probably just on some pixels) because 5m is not a multiple of 2m, so pixels won't align exactly among rasters. If you change resolution to 2,5m, 1m, etc, then all pixels should have same values.
– Andre Silva
Apr 7 at 0:32
1
1
@Summer, almost that, except that each 5m pixel becomes four 2.5m pixels with the same value of the 5m pixel (think in the second dimension).
– Andre Silva
Apr 7 at 0:58
@Summer, almost that, except that each 5m pixel becomes four 2.5m pixels with the same value of the 5m pixel (think in the second dimension).
– Andre Silva
Apr 7 at 0:58
|
show 1 more comment
1
What do you mean by "is it okay"? Nobody is going to arrest you for doing it. What do you mean by "reliable"? All data is unreliable in some sense. Have you looked at the QGIS raster processing options for doing this?
– Spacedman
Apr 6 at 8:48