RasterizedSource#
- class RasterizedSource[source]#
Bases:
RasterSource
A
RasterSource
based on the rasterization of a VectorSource.Attributes
Associated
CRSTransformer
.numpy.dtype
of the chips read from this source.Extent of the RasterSource.
Number of channels in the chips read from this source.
Shape of the raster as a (height, width, num_channels) tuple.
- __init__(vector_source: VectorSource, background_class_id: int, extent: Box, all_touched: bool = False, raster_transformers: List[RasterTransformer] = [])[source]#
Constructor.
- Parameters
vector_source (VectorSource) – The VectorSource to rasterize.
background_class_id (int) – The class_id to use for any background pixels, ie. pixels not covered by a polygon.
extent (Box) – Extent of corresponding imagery RasterSource.
all_touched (bool, optional) – If True, all pixels touched by geometries will be burned in. If false, only pixels whose center is within the polygon or that are selected by Bresenham’s line algorithm will be burned in. (See
rasterize()
for more details). Defaults to False.raster_transformers (List[RasterTransformer]) –
Methods
__init__
(vector_source, background_class_id, ...)Constructor.
get_chip
(window)Return the transformed chip in the window.
Return entire transformed image array.
get_raw_chip
(window)Return raw chip without applying channel_order or transforms.
Return raw image for the full extent.
validate_labels
(df)Validate label geometries.
- __init__(vector_source: VectorSource, background_class_id: int, extent: Box, all_touched: bool = False, raster_transformers: List[RasterTransformer] = [])[source]#
Constructor.
- Parameters
vector_source (VectorSource) – The VectorSource to rasterize.
background_class_id (int) – The class_id to use for any background pixels, ie. pixels not covered by a polygon.
extent (Box) – Extent of corresponding imagery RasterSource.
all_touched (bool, optional) – If True, all pixels touched by geometries will be burned in. If false, only pixels whose center is within the polygon or that are selected by Bresenham’s line algorithm will be burned in. (See
rasterize()
for more details). Defaults to False.raster_transformers (List[RasterTransformer]) –
- get_chip(window: Box) np.ndarray #
Return the transformed chip in the window.
Get a raw chip, extract subset of channels using channel_order, and then apply transformations.
- Parameters
window (Box) – The window for which to get the chip.
- Returns
Array of shape (height, width, channels).
- Return type
np.ndarray
- get_image_array() np.ndarray #
Return entire transformed image array.
Warning
Not safe to call on very large RasterSources.
- Returns
Array of shape (height, width, channels).
- Return type
np.ndarray
- get_raw_chip(window: Box) np.ndarray #
Return raw chip without applying channel_order or transforms.
- Parameters
window (Box) – The window for which to get the chip.
- Returns
Array of shape (height, width, channels).
- Return type
np.ndarray
- get_raw_image_array() np.ndarray #
Return raw image for the full extent.
Warning
Not safe to call on very large RasterSources.
- Returns
Array of shape (height, width, channels).
- Return type
np.ndarray
- validate_labels(df: geopandas.GeoDataFrame) None [source]#
Validate label geometries.
- Parameters
df (gpd.GeoDataFrame) – Label geometries.
- Raises
ValueError – If
Point
orLineString
geometries found.ValueError – If geometries are missing class IDs.
- Return type
None
- property crs_transformer#
Associated
CRSTransformer
.