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Merged
konstntokas merged 5 commits into from
Mar 17, 2026
Merged

Enhance affine transformation #33

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e279d35
clip if needed in reporject_dtaaset
konstntokas Mar 16, 2026
fa312d9
affine transform adjusted
konstntokas Mar 17, 2026
26f8791
clipping added
konstntokas Mar 17, 2026
24ba729
limit to 2 and 3 dims for affine transform
konstntokas Mar 17, 2026
e014b7e
example tested
konstntokas Mar 17, 2026
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9 changes: 9 additions & 0 deletions CHANGES.md
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only loosely fit the scope of the **xcube-resampling** repository.
- Added `xcube_resampling.utils.get_utm_crs` to return the UTM CRS for a given
longitude and latitude pair.
- In `xcube_resampling.reproject_dataset`, the dataset is now clipped when the target
grid-mapping covers less than 80% of the source grid-mapping, improving performance
for reprojected cutouts.
- In `xcube_resampling.affine_transform_dataset`, resampling is now performed per
spatial slice, ensuring that interpolation is applied only along the spatial axes
and no longer across non-spatial dimensions (e.g., time).
- When `prevent_nan_propagation=True`, computation is now fully lazy. Previously, the
implementation checked for NaN values in the source array, which triggered loading
of the entire dataset into memory.


## Changes in 0.3.1
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4 changes: 2 additions & 2 deletions examples/affine.ipynb
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" * lon (lon) float64 64B 50.05 50.15 50.25 50.35 50.45 50.55 50.65 50.75\n",
" * lat (lat) float64 48B 10.55 10.45 10.35 10.25 10.15 10.05\n",
"Data variables:\n",
" refl (lat, lon) float64 384B 0.0 1.0 0.0 2.0 0.0 ... 0.0 2.0 0.0 3.0 0.0</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.Dataset</div></div><ul class='xr-sections'><li class='xr-section-item'><input id='section-298e7c49-52b0-4138-8b74-89b388d11640' class='xr-section-summary-in' type='checkbox' disabled /><label for='section-298e7c49-52b0-4138-8b74-89b388d11640' class='xr-section-summary'>Dimensions:</label><div class='xr-section-inline-details'><ul class='xr-dim-list'><li><span class='xr-has-index'>lon</span>: 8</li><li><span class='xr-has-index'>lat</span>: 6</li></ul></div></li><li class='xr-section-item'><input id='section-d1f68771-7c7b-4b0e-a02d-3fcb43af46f3' class='xr-section-summary-in' type='checkbox' checked /><label for='section-d1f68771-7c7b-4b0e-a02d-3fcb43af46f3' class='xr-section-summary' title='Expand/collapse section'>Coordinates: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lon</span></div><div class='xr-var-dims'>(lon)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>50.05 50.15 50.25 ... 50.65 50.75</div><input id='attrs-075dc588-4aae-4dad-8fe0-cba127785710' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-075dc588-4aae-4dad-8fe0-cba127785710' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-fcd756b1-4723-4f61-a7fb-4c98960931f3' class='xr-var-data-in' type='checkbox'><label for='data-fcd756b1-4723-4f61-a7fb-4c98960931f3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([50.05, 50.15, 50.25, 50.35, 50.45, 50.55, 50.65, 50.75])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lat</span></div><div class='xr-var-dims'>(lat)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>10.55 10.45 10.35 10.25 10.15 10.05</div><input id='attrs-c2f461e8-195c-464d-a875-1e4d4102ec12' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-c2f461e8-195c-464d-a875-1e4d4102ec12' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-1037fefd-a5f5-4cac-b500-42163b3128aa' class='xr-var-data-in' type='checkbox'><label for='data-1037fefd-a5f5-4cac-b500-42163b3128aa' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([10.55, 10.45, 10.35, 10.25, 10.15, 10.05])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-59c34f97-8907-429d-98cc-199fa67e6e59' class='xr-section-summary-in' type='checkbox' checked /><label for='section-59c34f97-8907-429d-98cc-199fa67e6e59' class='xr-section-summary' title='Expand/collapse section'>Data variables: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>refl</span></div><div class='xr-var-dims'>(lat, lon)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>0.0 1.0 0.0 2.0 ... 2.0 0.0 3.0 0.0</div><input id='attrs-7bbb787a-7f1a-49d7-b57e-0b9c866d6bcc' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-7bbb787a-7f1a-49d7-b57e-0b9c866d6bcc' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-e0a3c631-30cf-4938-acf6-966e67540654' class='xr-var-data-in' type='checkbox'><label for='data-e0a3c631-30cf-4938-acf6-966e67540654' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([[0., 1., 0., 2., 0., 3., 0., 4.],\n",
" refl (lat, lon) float64 384B 0.0 1.0 0.0 2.0 0.0 ... 0.0 2.0 0.0 3.0 0.0</pre><div class='xr-wrap' style='display:none'><div class='xr-header'><div class='xr-obj-type'>xarray.Dataset</div></div><ul class='xr-sections'><li class='xr-section-item'><input id='section-79bbd7cc-0592-4080-8c24-a40ea51ba6df' class='xr-section-summary-in' type='checkbox' disabled /><label for='section-79bbd7cc-0592-4080-8c24-a40ea51ba6df' class='xr-section-summary'>Dimensions:</label><div class='xr-section-inline-details'><ul class='xr-dim-list'><li><span class='xr-has-index'>lon</span>: 8</li><li><span class='xr-has-index'>lat</span>: 6</li></ul></div></li><li class='xr-section-item'><input id='section-c24b6386-5cb8-4ac6-b2df-998b2d1c3e73' class='xr-section-summary-in' type='checkbox' checked /><label for='section-c24b6386-5cb8-4ac6-b2df-998b2d1c3e73' class='xr-section-summary' title='Expand/collapse section'>Coordinates: <span>(2)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lon</span></div><div class='xr-var-dims'>(lon)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>50.05 50.15 50.25 ... 50.65 50.75</div><input id='attrs-575b1435-bbad-44a5-8774-298aef02be00' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-575b1435-bbad-44a5-8774-298aef02be00' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-bc0f856e-0a98-4919-9e3d-6f0c0909b80c' class='xr-var-data-in' type='checkbox'><label for='data-bc0f856e-0a98-4919-9e3d-6f0c0909b80c' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([50.05, 50.15, 50.25, 50.35, 50.45, 50.55, 50.65, 50.75])</pre></div></li><li class='xr-var-item'><div class='xr-var-name'><span class='xr-has-index'>lat</span></div><div class='xr-var-dims'>(lat)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>10.55 10.45 10.35 10.25 10.15 10.05</div><input id='attrs-995ddcf7-72ce-4586-996d-b195b0b75698' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-995ddcf7-72ce-4586-996d-b195b0b75698' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-0d3c5211-240b-4f0e-ad90-7b11cccfa0bd' class='xr-var-data-in' type='checkbox'><label for='data-0d3c5211-240b-4f0e-ad90-7b11cccfa0bd' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([10.55, 10.45, 10.35, 10.25, 10.15, 10.05])</pre></div></li></ul></div></li><li class='xr-section-item'><input id='section-76c3ae06-891c-4bee-9332-23c1c82b8903' class='xr-section-summary-in' type='checkbox' checked /><label for='section-76c3ae06-891c-4bee-9332-23c1c82b8903' class='xr-section-summary' title='Expand/collapse section'>Data variables: <span>(1)</span></label><div class='xr-section-inline-details'></div><div class='xr-section-details'><ul class='xr-var-list'><li class='xr-var-item'><div class='xr-var-name'><span>refl</span></div><div class='xr-var-dims'>(lat, lon)</div><div class='xr-var-dtype'>float64</div><div class='xr-var-preview xr-preview'>0.0 1.0 0.0 2.0 ... 2.0 0.0 3.0 0.0</div><input id='attrs-757d3009-d88f-4655-a6be-1f88eaa4469f' class='xr-var-attrs-in' type='checkbox' disabled><label for='attrs-757d3009-d88f-4655-a6be-1f88eaa4469f' title='Show/Hide attributes'><svg class='icon xr-icon-file-text2'><use xlink:href='#icon-file-text2'></use></svg></label><input id='data-48f6ebdd-7b9c-484e-a527-72f222336df3' class='xr-var-data-in' type='checkbox'><label for='data-48f6ebdd-7b9c-484e-a527-72f222336df3' title='Show/Hide data repr'><svg class='icon xr-icon-database'><use xlink:href='#icon-database'></use></svg></label><div class='xr-var-attrs'><dl class='xr-attrs'></dl></div><div class='xr-var-data'><pre>array([[0., 1., 0., 2., 0., 3., 0., 4.],\n",
" [2., 0., 3., 0., 4., 0., 1., 0.],\n",
" [0., 4., 0., 1., 0., 2., 0., 3.],\n",
" [1., 0., 2., 0., 3., 0., 4., 0.],\n",
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"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.14.3"
"version": "3.13.12"
}
},
"nbformat": 4,
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