class GeoTextPlot(GeoAnnotationPlot, TextPlot):
"Draw the Text annotation object"
def draw_annotation(self, axis, data, crs, opts):
(x,y, text, fontsize,
horizontalalignment, verticalalignment, rotation) = data
opts['fontsize'] = fontsize
x, y = axis.projection.transform_point(x, y, src_crs=crs)
return [axis.text(x, y, text,
horizontalalignment=horizontalalignment,
verticalalignment=verticalalignment,
rotation=rotation, **opts)]
# Register plots with HoloViews
Store.register({Contours: GeoContourPlot,
Image: GeoImagePlot,
GeoFeature: GeoFeaturePlot,
WMTS: WMTSPlot,
GeoTiles: GeoTilePlot,
Points: GeoPointPlot,
Text: GeoTextPlot,
Layout: LayoutPlot,
Overlay: OverlayPlot}, 'matplotlib')
# Define plot and style options
opts = Store.options(backend='matplotlib')
OverlayPlot.aspect = 'equal'
Store.register({LineContours: LineContourPlot,
FilledContours: FilledContourPlot,
Image: GeoImagePlot,
Feature: FeaturePlot,
WMTS: WMTSPlot,
Tiles: WMTSPlot,
Points: GeoPointPlot,
Labels: GeoLabelsPlot,
VectorField: GeoVectorFieldPlot,
Text: GeoTextPlot,
Layout: LayoutPlot,
NdLayout: LayoutPlot,
Overlay: GeoOverlayPlot,
Polygons: GeoPolygonPlot,
Path: GeoPathPlot,
Contours: GeoContourPlot,
RGB: GeoRGBPlot,
Shape: GeoShapePlot,
Graph: GeoGraphPlot,
TriMesh: GeoTriMeshPlot,
Nodes: GeoPointPlot,
EdgePaths: GeoPathPlot,
HexTiles: GeoHexTilesPlot,
QuadMesh: GeoQuadMeshPlot}, 'matplotlib')
# Define plot and style options
options = Store.options(backend='matplotlib')
options.Shape = Options('style', edgecolor='black', facecolor='#30A2DA')
import numpy as np
import holoviews as hv
hv.extension('bokeh', logo=False)
import param
import panel as pn
import matplotlib.pyplot as plt
from holoviews.operation.datashader import rasterize
from bokeh.models import WheelZoomTool
from holoviews.core import Store
valid_rgb_options = [
k for group in ['style', 'plot', 'norm', 'output']
for k in Store.options(backend='bokeh')['RGB'][group].allowed_keywords
]
valid_rgb_options.remove(
'alpha') # remove option set by sliders on individual channels
# TODO move to color module
import colorcet as cc
# repeat colormap to handle unint16 values
# needed to handle non continuous labels because colormap is stretched (and not cycled)
label_cmap = cc.b_glasbey_hv * 256
# bokeh hook workaround --> remove if holoviews finally handle this
def zoom_bounds_hook(bounds):
'''restrict zooming out to given bounds'''
def _hook(plot, element):
plot.state.x_range.bounds = (bounds[0], bounds[2])