一种基于卷积的城市范围检测方法。
urban-footprinter的Python项目详细描述
城市足迹
基于可重用卷积的栅格数据城市范围检测方法。在
| LULC | Convolution result | Computed urban extent |
|---|---|---|
该方法基于Atlas of Urban Expansion中使用的方法。其主要思想是，一个像素被视为城市范围的一部分，这取决于它周围的建成像素的比例。请参阅notebook overview或this blog post以获取有关该过程的更详细描述。在
安装和使用
要使用pip安装：
$ pip install urban-footprinter
或克隆回购：
^{pr2}$然后将其用作：
importurban_footprinterasufp# Or use `ufp.urban_footprint_mask_shp` to obtain the urban extent as a # shapely geometryurban_mask=ufp.urban_footprint_mask("path/to/raster.tif",kernel_radius,urban_threshold,urban_classes=urban_classes)
在哪里
help(ufp.urban_footprint_mask)
Help on function urban_footprint_mask in module urban_footprinter:
urban_footprint_mask(raster, kernel_radius, urban_threshold, urban_classes=None, largest_patch_only=True, buffer_dist=None, res=None)
Computes a boolean mask of the urban footprint of a given raster.
Parameters
----------
raster : ndarray or str, file object or pathlib.Path object
Land use/land cover (LULC) raster. If passing a ndarray (instead of the
path to a geotiff), the resolution (in meters) must be passed to the
`res` keyword argument.
kernel_radius : numeric
The radius (in meters) of the circular kernel used in the convolution.
urban_threshold : float from 0 to 1
Proportion of neighboring (within the kernel) urban pixels after which
a given pixel is considered urban.
urban_classes : int or list-like, optional
Code or codes of the LULC classes that must be considered urban. Not
needed if `raster` is already a boolean array of urban/non-urban LULC
classes.
largest_patch_only : boolean, default True
Whether the returned urban/non-urban mask should feature only the
largest urban patch.
buffer_dist : numeric, optional
Distance to be buffered around the urban/non-urban mask. If no value is
provided, no buffer is applied.
res : numeric, optional
Resolution of the `raster` (assumes square pixels). Ignored if `raster`
is a path to a geotiff.
Returns
-------
urban_mask : ndarray
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