cartopy五个常用模块

cartopy五个常用模块

1、GeoAxes.set_extent()   对图形范围（经纬度）进行设置的函数

set_extent(self, extents, crs=None)
    Set the extent (x0, x1, y0, y1) of the map in the given
    coordinate system.
    
    If no crs is given, the extents' coordinate system will be assumed
    to be the Geodetic version of this axes' projection.
    
    Parameters
    ----------
    extent
        Tuple of floats representing the required extent (x0, x1, y0, y1).

 

2、GeoAxes.add_feature()    添加地理特征要素

add_feature(self, feature, **kwargs)
    Add the given :class:`~cartopy.feature.Feature` instance to the axes.
    
    Parameters
    ----------
    feature
        An instance of :class:`~cartopy.feature.Feature`.
    
    Returns
    -------
    A :class:`cartopy.mpl.feature_artist.FeatureArtist` instance
        The instance responsible for drawing the feature.
    
    Note
    ----
        Matplotlib keyword arguments can be used when drawing the feature.
        This allows standard Matplotlib control over aspects such as
        'facecolor', 'alpha', etc.

 

 import cartopy.feature as cfeature

feature参数，函数cartoopy.feature.

DATA
    BORDERS = <cartopy.feature.NaturalEarthFeature object>
    COASTLINE = <cartopy.feature.NaturalEarthFeature object>
    COLORS = {'land': array([0.9375  , 0.9375  , 0.859375]), 'land_alt1': ...
    LAKES = <cartopy.feature.NaturalEarthFeature object>
    LAND = <cartopy.feature.NaturalEarthFeature object>           陆地
    OCEAN = <cartopy.feature.NaturalEarthFeature object>          海洋
    RIVERS = <cartopy.feature.NaturalEarthFeature object>
    STATES = <cartopy.feature.NaturalEarthFeature object>
    absolute_import = _Feature((2, 5, 0, 'alpha', 1), (3, 0, 0, 'alpha', 0...
    division = _Feature((2, 2, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0), 8192...
    print_function = _Feature((2, 6, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0)...

**kwargs通用参数

       with_scale()      alpha = 透明度

3、GeoAxes.add_geometries()

add_geometries(self, geoms, crs, **kwargs)
    Add the given shapely geometries (in the given crs) to the axes.
    
    Parameters
    ----------
    geoms
        A collection of shapely geometries.
    crs
        The cartopy CRS in which the provided geometries are defined.
    styler
        A callable that returns matplotlib patch styling given a geometry.
    
    Returns
    -------
    A :class:`cartopy.mpl.feature_artist.FeatureArtist` instance
        The instance responsible for drawing the feature.
    
    Note
    ----
        Matplotlib keyword arguments can be used when drawing the feature.
        This allows standard Matplotlib control over aspects such as
        'facecolor', 'alpha', etc.

 

4、GeoAxes.gridlines()     是否在画图时打开网格线

class cartopy.mpl.gridliner.Gridliner(axes, crs, draw_labels=False, xlocator=None, ylocator=None,
 collection_kwargs=None, xformatter=None, yformatter=None, dms=False, x_inline=None, y_inline=None,
 auto_inline=True, xlim=None, ylim=None, rotate_labels=None, xlabel_style=None, ylabel_style=None,
 labels_bbox_style=None, xpadding=5, ypadding=5, offset_angle=25, auto_update=False, formatter_kwargs=None)[source]
property bottom_label_artists
The bottom labels which were created at draw time

bottom_labels
Whether to draw labels on the bottom of the map.

collection_kwargs
A dictionary passed through to matplotlib.collections.LineCollection on grid line creation.

property geo_label_artists
The geo spine labels which were created at draw time

geo_labels
Whether to draw labels near the geographic limits of the map.

property label_artists
All the labels which were created at draw time

labels_bbox_style
bbox style for grid labels

property left_label_artists
The left labels which were created at draw time

left_labels
Whether to draw labels on the left hand side of the map.

n_steps
The number of interpolation points which are used to draw the gridlines.

property right_label_artists
The right labels which were created at draw time

right_labels
Whether to draw labels on the right hand side of the map.

property top_label_artists
The top labels which were created at draw time

top_labels
Whether to draw labels on the top of the map.

x_inline
Whether to draw x labels inline

property x_inline_label_artists
The x-coordinate inline labels which were created at draw time

xformatter
The Formatter to use for the lon labels.

property xlabel_artists
The x-coordinate labels which were created at draw time

xlabel_style
A dictionary passed through to ax.text on x label creation for styling of the text labels.

xline_artists
The x gridlines which were created at draw time.

xlines
Whether to draw the x gridlines.

xpadding
The padding from the map edge to the x labels in points.

y_inline
Whether to draw y labels inline

property y_inline_label_artists
The y-coordinate inline labels which were created at draw time

yformatter
The Formatter to use for the lat labels.

property ylabel_artists¶
The y-coordinate labels which were created at draw time

ylabel_style
A dictionary passed through to ax.text on y label creation for styling of the text labels.

yline_artists
The y gridlines which were created at draw time.

ylines
Whether to draw the y gridlines.

ypadding
The padding from the map edge to the y labels in points.

                           例 ax.gridlines(draw_labels=Flase)  如果设置为True，标签会很混乱，用下面讲的函数来设置标签

5、cticker.LongitudeFormatter()    设置经纬度坐标刻度

  import cartopy.mpl.ticker as cticker

 

class cartopy.mpl.gridliner.Gridliner(axes, crs, draw_labels=False, xlocator=None, ylocator=None, collection_kwargs=None, xformatter=None, yformatter=None, dms=False, x_inline=None, y_inline=None, auto_inline=True, xlim=None, ylim=None, rotate_labels=None, xlabel_style=None, ylabel_style=None, labels_bbox_style=None, xpadding=5, ypadding=5, offset_angle=25, auto_update=False, formatter_kwargs=None)[source]

property bottom_label_artists

The bottom labels which were created at draw time

bottom_labels

Whether to draw labels on the bottom of the map.

collection_kwargs

A dictionary passed through to matplotlib.collections.LineCollection on grid line creation.

property geo_label_artists

The geo spine labels which were created at draw time

geo_labels

Whether to draw labels near the geographic limits of the map.

property label_artists

All the labels which were created at draw time

labels_bbox_style

bbox style for grid labels

property left_label_artists

The left labels which were created at draw time

left_labels

Whether to draw labels on the left hand side of the map.

n_steps

The number of interpolation points which are used to draw the gridlines.

property right_label_artists

The right labels which were created at draw time

right_labels

Whether to draw labels on the right hand side of the map.

property top_label_artists

The top labels which were created at draw time

top_labels

Whether to draw labels on the top of the map.

x_inline

Whether to draw x labels inline

property x_inline_label_artists

The x-coordinate inline labels which were created at draw time

xformatter

The Formatter to use for the lon labels.

property xlabel_artists

The x-coordinate labels which were created at draw time

xlabel_style

A dictionary passed through to ax.text on x label creation for styling of the text labels.

xline_artists

The x gridlines which were created at draw time.

xlines

Whether to draw the x gridlines.

xpadding

The padding from the map edge to the x labels in points.

y_inline

Whether to draw y labels inline

property y_inline_label_artists

The y-coordinate inline labels which were created at draw time

yformatter

The Formatter to use for the lat labels.

property ylabel_artists¶

The y-coordinate labels which were created at draw time

ylabel_style

A dictionary passed through to ax.text on y label creation for styling of the text labels.

yline_artists

The y gridlines which were created at draw time.

ylines

Whether to draw the y gridlines.

ypadding

The padding from the map edge to the y labels in points.