Composition from Rasterio and GeoPandas#
GeoUtils’ main classes Raster and Vector are linked to Rasterio and
GeoPandas, respectively, through class composition.
They directly rely on their robust geospatial handling functionalities, as well of that of PyProj, and add a layer on top for interfacing between rasters and vectors with higher-level operations, performing easier numerical analysis, and adding more advanced geospatial functionalities.
The Raster class composition#
The Raster is a composition class with four main attributes:
a
numpy.ma.MaskedArrayasdata,an
affine.Affineastransform,a
pyproj.crs.CRSascrs, and
import geoutils as gu
# Instantiate a raster from a filename on disk
filename_rast = gu.examples.get_path("exploradores_aster_dem")
rast = gu.Raster(filename_rast)
rast
Show code cell output
Raster(
data=not_loaded; shape on disk (1, 618, 539); will load (618, 539)
transform=| 30.00, 0.00, 627175.00|
| 0.00,-30.00, 4852085.00|
| 0.00, 0.00, 1.00|
crs=EPSG:32718
nodata=-9999.0)From these four main attributes, many other derivatives attributes exist, such as bounds or res to
describe georeferencing. When a Raster is based on an on-disk dataset, other attributes exist such as name or
driver, see The georeferenced raster (Raster) for a summary, or the dedicated sections of the API for a full listing.
Note
By default, data is not loaded during instantiation. See Implicit lazy loading for more details.
# Show summarized information
rast.info()
Show code cell output
Driver: GTiff
Opened from file: /home/docs/checkouts/readthedocs.org/user_builds/geoutils/checkouts/latest/examples/data/Exploradores_ASTER/AST_L1A_00303182012144228_Z.tif
Filename: /home/docs/checkouts/readthedocs.org/user_builds/geoutils/checkouts/latest/examples/data/Exploradores_ASTER/AST_L1A_00303182012144228_Z.tif
Loaded? False
Modified since load? False
Grid size: 539, 618
Number of bands: 1
Data types: float32
Coordinate system: ['EPSG:32718']
Nodata value: -9999.0
Pixel interpretation: Area
Pixel size: 30.0, 30.0
Upper left corner: 627175.0, 4833545.0
Lower right corner: 643345.0, 4852085.0
Important
The Raster is not a composition of either a rasterio.io.DatasetReader, a rasterio.io.MemoryFile or a rasterio.io.DatasetWriter.
It is only linked to those objects to initiate a Raster instance which first loads the metadata (notably the three main metadata attributes
crs, transform and nodata).
Then, explicitly or implicitly, it can also load the array data when an on-disk dataset exists, or save the in-memory
dataset to a file.
A Raster generally exists only as an in-memory dataset, not linked to anything else than a numpy.ma.MaskedArray in data
(for instance, when creating from from_array()). If a numerical operation is performed on a Raster opened from an
on-disk dataset, the new dataset will be modified in-memory.
Note
To check if a Raster was loaded from the on-disk data, use the is_loaded attribute.
To check if the Raster was modified since loading from the on-disk data, use the is_modified attribute.
See The georeferenced raster (Raster) for more details.
The Vector class composition#
A Vector is a composition class with a single main attribute: a GeoDataFrame as ds.
A Vector’s dataframe ds is directly loaded in-memory
(might evolve towards lazy behaviour soon through Dask-GeoPandas).
# Instantiate a vector from a filename on disk
filename_vect = gu.examples.get_path("exploradores_rgi_outlines")
vect = gu.Vector(filename_vect)
vect
Show code cell output
Vector(
ds= RGIId GLIMSId BgnDate EndDate CenLon CenLat \
0 RGI60-17.08409 G286876E46647S 20009999 20030531 -73.1236 -46.6473
1 RGI60-17.08414 G286891E46646S 20009999 20030531 -73.1091 -46.6458
2 RGI60-17.08421 G286879E46639S 20009999 20030531 -73.1212 -46.6385
3 RGI60-17.08422 G286891E46638S 20009999 20030531 -73.1089 -46.6378
4 RGI60-17.08440 G286866E46604S 20009999 20030531 -73.1340 -46.6040
5 RGI60-17.08444 G286927E46605S 20009999 20030531 -73.0726 -46.6047
6 RGI60-17.08461 G286886E46584S 20009999 20030531 -73.1144 -46.5838
7 RGI60-17.08470 G286905E46592S 20009999 20030531 -73.0947 -46.5923
8 RGI60-17.08481 G286896E46574S 20009999 20030531 -73.1036 -46.5743
9 RGI60-17.08503 G286874E46559S 20009999 20030531 -73.1262 -46.5587
10 RGI60-17.08517 G286877E46552S 20009999 20030531 -73.1227 -46.5517
11 RGI60-17.08519 G286862E46546S 20009999 20030531 -73.1381 -46.5463
12 RGI60-17.08523 G286917E46559S 20009999 20030531 -73.0834 -46.5588
13 RGI60-17.08531 G286925E46542S 20009999 20030531 -73.0746 -46.5418
14 RGI60-17.08558 G286902E46514S 20009999 20030531 -73.0980 -46.5142
15 RGI60-17.08613 G286738E46487S 20009999 20030531 -73.2620 -46.4874
16 RGI60-17.08618 G286734E46482S 20009999 20030531 -73.2661 -46.4821
17 RGI60-17.08626 G286720E46478S 20009999 20030531 -73.2801 -46.4777
18 RGI60-17.08631 G286750E46481S 20009999 20030531 -73.2499 -46.4810
19 RGI60-17.08639 G286646E46474S 20009999 20030531 -73.3538 -46.4741
20 RGI60-17.08642 G286734E46476S 20009999 20030531 -73.2656 -46.4758
21 RGI60-17.08643 G286854E46466S 20009999 20030531 -73.1460 -46.4663
22 RGI60-17.08646 G286650E46467S 20009999 20030531 -73.3498 -46.4665
23 RGI60-17.08651 G286871E46459S 20009999 20030531 -73.1288 -46.4589
24 RGI60-17.08658 G286874E46454S 20009999 20030531 -73.1264 -46.4541
25 RGI60-17.08663 G286838E46450S 20009999 20030531 -73.1619 -46.4501
26 RGI60-17.08664 G286661E46457S 20009999 20030531 -73.3390 -46.4568
27 RGI60-17.08668 G286843E46450S 20009999 20030531 -73.1569 -46.4498
28 RGI60-17.08673 G286610E46451S 20009999 20030531 -73.3900 -46.4507
29 RGI60-17.08703 G286615E46454S 20009999 20030531 -73.3851 -46.4538
30 RGI60-17.15808 G286520E46720S 20011103 -9999999 -73.4800 -46.7200
31 RGI60-17.15809 G286570E46600S 20011103 -9999999 -73.4300 -46.6000
32 RGI60-17.15815 G286550E46560S 20011103 -9999999 -73.4500 -46.5600
33 RGI60-17.15821 G286530E46483S 20011103 -9999999 -73.4700 -46.4830
34 RGI60-17.15822 G286287E46621S 20011103 -9999999 -73.7130 -46.6210
35 RGI60-17.15825 G286620E46550S 20011103 -9999999 -73.3800 -46.5500
36 RGI60-17.15826 G286735E46710S 20011103 -9999999 -73.2650 -46.7100
37 RGI60-17.15827 G286705E46538S 20011103 -9999999 -73.2950 -46.5380
38 RGI60-17.15828 G286731E46517S 20011103 -9999999 -73.2690 -46.5170
39 RGI60-17.15829 G286746E46519S 20011103 -9999999 -73.2540 -46.5190
40 RGI60-17.15830 G286735E46710S 20011103 -9999999 -73.2650 -46.7100
41 RGI60-17.15831 G286716E46597S 20011103 -9999999 -73.2840 -46.5970
42 RGI60-17.15832 G286735E46710S 20011103 -9999999 -73.2650 -46.7100
43 RGI60-17.15833 G286767E46628S 20011103 -9999999 -73.2330 -46.6280
44 RGI60-17.15834 G286765E46650S 20011103 -9999999 -73.2350 -46.6500
45 RGI60-17.15835 G286735E46710S 20011103 -9999999 -73.2650 -46.7100
46 RGI60-17.15836 G286697E46659S 20011103 -9999999 -73.3030 -46.6590
O1Region O2Region Area Zmin ... Aspect Lmax Status Connect \
0 17 1 0.520 1182 ... 196 797 0 0
1 17 1 1.342 1181 ... 152 1381 0 0
2 17 1 0.530 1443 ... 302 977 0 0
3 17 1 0.924 1354 ... 89 1264 0 0
4 17 1 0.156 1124 ... 156 524 0 0
5 17 1 3.895 967 ... 219 3499 0 0
6 17 1 0.087 1405 ... 232 361 0 0
7 17 1 9.866 741 ... 199 5967 0 0
8 17 1 2.200 1006 ... 278 1890 0 0
9 17 1 1.919 1003 ... 202 1885 0 0
10 17 1 2.252 995 ... 32 1271 0 0
11 17 1 0.596 1166 ... 326 813 0 0
12 17 1 5.487 800 ... 308 2465 0 0
13 17 1 2.191 948 ... 62 2125 0 0
14 17 1 0.094 1251 ... 154 236 0 0
15 17 1 0.036 1275 ... 139 396 0 0
16 17 1 0.109 1361 ... 0 355 0 0
17 17 1 0.109 1373 ... 71 215 0 0
18 17 1 0.506 1227 ... 141 499 0 0
19 17 1 0.234 1074 ... 130 316 0 0
20 17 1 1.587 1136 ... 344 1935 0 0
21 17 1 0.210 1243 ... 145 451 0 0
22 17 1 0.118 1170 ... 102 293 0 0
23 17 1 0.187 1245 ... 165 379 0 0
24 17 1 0.030 1216 ... 87 180 0 0
25 17 1 0.038 1310 ... 182 250 0 0
26 17 1 0.197 1189 ... 131 325 0 0
27 17 1 0.123 1136 ... 139 526 0 0
28 17 1 0.681 790 ... 196 864 0 0
29 17 1 1.322 940 ... 116 995 0 0
30 17 1 721.950 43 ... 265 53509 0 0
31 17 1 126.949 23 ... 287 17716 0 0
32 17 1 71.511 47 ... 302 22268 0 0
33 17 1 7.013 289 ... 53 6261 0 0
34 17 1 1.453 846 ... 124 735 0 0
35 17 1 65.501 218 ... 24 17953 0 0
36 17 1 0.442 1218 ... 78 466 0 0
37 17 1 4.470 1210 ... 350 1574 0 0
38 17 1 1.624 1186 ... 39 2221 0 0
39 17 1 0.891 1111 ... 96 937 0 0
40 17 1 0.180 796 ... 150 736 0 0
41 17 1 85.788 158 ... 54 19749 0 0
42 17 1 1.025 904 ... 118 560 0 0
43 17 1 13.403 340 ... 68 10501 0 0
44 17 1 10.522 510 ... 113 7012 0 0
45 17 1 7.632 775 ... 231 1184 0 0
46 17 1 41.513 380 ... 123 13262 0 0
Form TermType Surging Linkages Name \
0 0 0 9 9 None
1 0 0 9 9 None
2 0 0 9 9 None
3 0 0 9 9 None
4 0 0 9 9 None
5 0 0 9 9 None
6 0 0 9 9 None
7 0 2 9 9 None
8 0 0 9 9 None
9 1 0 9 9 None
10 1 0 9 9 None
11 0 0 9 9 None
12 0 0 9 9 None
13 0 0 9 9 None
14 0 0 9 9 None
15 0 0 9 9 None
16 0 0 9 9 None
17 0 0 9 9 None
18 0 0 9 9 None
19 0 0 9 9 None
20 0 0 9 9 None
21 0 0 9 9 None
22 0 0 9 9 None
23 0 0 9 9 None
24 0 0 9 9 None
25 0 0 9 9 None
26 0 0 9 9 None
27 0 0 9 9 None
28 0 0 9 9 None
29 0 0 9 9 None
30 0 1 9 9 San Rafael
31 0 2 9 9 Gualas
32 0 2 9 9 Reichert
33 0 2 9 9 Verde
34 0 0 9 9 None
35 0 2 9 9 Grosse
36 0 0 9 9 None
37 0 0 9 9 None
38 0 0 9 9 None
39 0 0 9 9 None
40 0 0 9 9 None
41 0 0 9 9 Exploradores
42 0 0 9 9 None
43 0 0 9 9 Bayo
44 0 0 9 9 U-6
45 0 0 9 9 None
46 0 2 9 9 Fiero
geometry
0 MULTIPOLYGON (((-73.11803 -46.64900, -73.11829...
1 MULTIPOLYGON (((-73.10885 -46.64261, -73.10886...
2 MULTIPOLYGON (((-73.11682 -46.63879, -73.11678...
3 MULTIPOLYGON (((-73.10885 -46.64261, -73.10924...
4 MULTIPOLYGON (((-73.13223 -46.60028, -73.13225...
5 MULTIPOLYGON (((-73.06497 -46.59154, -73.06456...
6 MULTIPOLYGON (((-73.11366 -46.58218, -73.11259...
7 MULTIPOLYGON (((-73.06988 -46.57715, -73.06988...
8 MULTIPOLYGON (((-73.10740 -46.56410, -73.10700...
9 MULTIPOLYGON (((-73.13354 -46.55352, -73.13340...
10 MULTIPOLYGON (((-73.11662 -46.54876, -73.11676...
11 MULTIPOLYGON (((-73.12973 -46.54177, -73.12953...
12 MULTIPOLYGON (((-73.08150 -46.54548, -73.08151...
13 MULTIPOLYGON (((-73.06693 -46.54848, -73.06715...
14 MULTIPOLYGON (((-73.09498 -46.51290, -73.09496...
15 MULTIPOLYGON (((-73.26343 -46.48548, -73.26342...
16 MULTIPOLYGON (((-73.26768 -46.48257, -73.26798...
17 MULTIPOLYGON (((-73.27852 -46.47776, -73.27857...
18 MULTIPOLYGON (((-73.25453 -46.48264, -73.25492...
19 MULTIPOLYGON (((-73.35668 -46.47795, -73.35670...
20 MULTIPOLYGON (((-73.26943 -46.48095, -73.26939...
21 MULTIPOLYGON (((-73.14301 -46.46434, -73.14303...
22 MULTIPOLYGON (((-73.34771 -46.46459, -73.34769...
23 MULTIPOLYGON (((-73.12796 -46.45651, -73.12799...
24 MULTIPOLYGON (((-73.12474 -46.45528, -73.12476...
25 MULTIPOLYGON (((-73.16107 -46.44905, -73.16106...
26 MULTIPOLYGON (((-73.33401 -46.45251, -73.33440...
27 MULTIPOLYGON (((-73.15723 -46.44710, -73.15690...
28 MULTIPOLYGON (((-73.39064 -46.44468, -73.39045...
29 MULTIPOLYGON (((-73.38584 -46.45433, -73.38580...
30 MULTIPOLYGON (((-73.79749 -46.66563, -73.79788...
31 MULTIPOLYGON (((-73.35278 -46.60069, -73.35277...
32 MULTIPOLYGON (((-73.56531 -46.54740, -73.56492...
33 MULTIPOLYGON (((-73.41283 -46.50246, -73.41283...
34 MULTIPOLYGON (((-73.40283 -46.49692, -73.40284...
35 MULTIPOLYGON (((-73.31737 -46.54240, -73.31698...
36 MULTIPOLYGON (((-73.30579 -46.52468, -73.30657...
37 MULTIPOLYGON (((-73.27290 -46.51339, -73.27289...
38 MULTIPOLYGON (((-73.25946 -46.51777, -73.25946...
39 MULTIPOLYGON (((-73.25347 -46.52173, -73.25386...
40 MULTIPOLYGON (((-73.24741 -46.52785, -73.24742...
41 MULTIPOLYGON (((-73.21109 -46.59721, -73.21070...
42 MULTIPOLYGON (((-73.19973 -46.58543, -73.19973...
43 MULTIPOLYGON (((-73.22511 -46.63577, -73.22785...
44 MULTIPOLYGON (((-73.22215 -46.66623, -73.22213...
45 MULTIPOLYGON (((-73.24759 -46.65583, -73.24720...
46 MULTIPOLYGON (((-73.30945 -46.70913, -73.30945...
[47 rows x 23 columns]
crs=EPSG:4326
bounds=BoundingBox(left=-73.85175999999996, bottom=-46.83761999999996, right=-73.05486243399997, top=-46.431213112999956))# Show summarized information
vect.info()
Show code cell output
"Filename: /home/docs/checkouts/readthedocs.org/user_builds/geoutils/checkouts/latest/examples/data/Exploradores_ASTER/17_rgi60_glacier_outlines.gpkg \nCoordinate System: EPSG:4326\nExtent: [-73.85175999999996, -46.83761999999996, -73.05486243399997, -46.431213112999956] \nNumber of features: 47 \nAttributes: ['RGIId', 'GLIMSId', 'BgnDate', 'EndDate', 'CenLon', 'CenLat', 'O1Region', 'O2Region', 'Area', 'Zmin', 'Zmax', 'Zmed', 'Slope', 'Aspect', 'Lmax', 'Status', 'Connect', 'Form', 'TermType', 'Surging', 'Linkages', 'Name', 'geometry']"
All geospatial methods of GeoDataFrame are directly available into Vector, and cast the output logically depending on
its type: to a Vector for a geometric output (e.g., boundary), or to pandas.Series that can be immediately appended to the
Vector for a per-feature non-geometric output (e.g., area).
# Compute the vector's boundary
vect.boundary
Show code cell output
Vector(
ds= geometry
0 MULTILINESTRING ((-73.11803 -46.64900, -73.118...
1 MULTILINESTRING ((-73.10885 -46.64261, -73.108...
2 MULTILINESTRING ((-73.11682 -46.63879, -73.116...
3 MULTILINESTRING ((-73.10885 -46.64261, -73.109...
4 MULTILINESTRING ((-73.13223 -46.60028, -73.132...
5 MULTILINESTRING ((-73.06497 -46.59154, -73.064...
6 MULTILINESTRING ((-73.11366 -46.58218, -73.112...
7 MULTILINESTRING ((-73.06988 -46.57715, -73.069...
8 MULTILINESTRING ((-73.10740 -46.56410, -73.107...
9 MULTILINESTRING ((-73.13354 -46.55352, -73.133...
10 MULTILINESTRING ((-73.11662 -46.54876, -73.116...
11 MULTILINESTRING ((-73.12973 -46.54177, -73.129...
12 MULTILINESTRING ((-73.08150 -46.54548, -73.081...
13 MULTILINESTRING ((-73.06693 -46.54848, -73.067...
14 MULTILINESTRING ((-73.09498 -46.51290, -73.094...
15 MULTILINESTRING ((-73.26343 -46.48548, -73.263...
16 MULTILINESTRING ((-73.26768 -46.48257, -73.267...
17 MULTILINESTRING ((-73.27852 -46.47776, -73.278...
18 MULTILINESTRING ((-73.25453 -46.48264, -73.254...
19 MULTILINESTRING ((-73.35668 -46.47795, -73.356...
20 MULTILINESTRING ((-73.26943 -46.48095, -73.269...
21 MULTILINESTRING ((-73.14301 -46.46434, -73.143...
22 MULTILINESTRING ((-73.34771 -46.46459, -73.347...
23 MULTILINESTRING ((-73.12796 -46.45651, -73.127...
24 MULTILINESTRING ((-73.12474 -46.45528, -73.124...
25 MULTILINESTRING ((-73.16107 -46.44905, -73.161...
26 MULTILINESTRING ((-73.33401 -46.45251, -73.334...
27 MULTILINESTRING ((-73.15723 -46.44710, -73.156...
28 MULTILINESTRING ((-73.39064 -46.44468, -73.390...
29 MULTILINESTRING ((-73.38584 -46.45433, -73.385...
30 MULTILINESTRING ((-73.79749 -46.66563, -73.797...
31 MULTILINESTRING ((-73.35278 -46.60069, -73.352...
32 MULTILINESTRING ((-73.56531 -46.54740, -73.564...
33 MULTILINESTRING ((-73.41283 -46.50246, -73.412...
34 MULTILINESTRING ((-73.40283 -46.49692, -73.402...
35 MULTILINESTRING ((-73.31737 -46.54240, -73.316...
36 MULTILINESTRING ((-73.30579 -46.52468, -73.306...
37 MULTILINESTRING ((-73.27290 -46.51339, -73.272...
38 MULTILINESTRING ((-73.25946 -46.51777, -73.259...
39 MULTILINESTRING ((-73.25347 -46.52173, -73.253...
40 MULTILINESTRING ((-73.24741 -46.52785, -73.247...
41 MULTILINESTRING ((-73.21109 -46.59721, -73.210...
42 MULTILINESTRING ((-73.19973 -46.58543, -73.199...
43 MULTILINESTRING ((-73.22511 -46.63577, -73.227...
44 MULTILINESTRING ((-73.22215 -46.66623, -73.222...
45 MULTILINESTRING ((-73.24759 -46.65583, -73.247...
46 MULTILINESTRING ((-73.30945 -46.70913, -73.309...
crs=EPSG:4326
bounds=BoundingBox(left=-73.85175999999996, bottom=-46.83761999999996, right=-73.05486243399997, top=-46.431213112999956))See The georeferenced vector (Vector) for more details.