61 cartoee scalebar

In [1]:

import ee
import geemap
from geemap import cartoee
import matplotlib.pyplot as plt

import ee import geemap from geemap import cartoee import matplotlib.pyplot as plt

cartopy is not installed. Please see https://scitools.org.uk/cartopy/docs/latest/installing.html#installing for instructions on how to install cartopy.

The easiest way to install cartopy is using conda: conda install -c conda-forge cartopy

In [2]:

geemap.ee_initialize()

geemap.ee_initialize()

In [3]:

# Get image
lon = -115.1585
lat = 36.1500
start_year = 1984
end_year = 2011

point = ee.Geometry.Point(lon, lat)
years = ee.List.sequence(start_year, end_year)


def get_best_image(year):

    start_date = ee.Date.fromYMD(year, 1, 1)
    end_date = ee.Date.fromYMD(year, 12, 31)
    image = (
        ee.ImageCollection("LANDSAT/LT05/C01/T1_SR")
        .filterBounds(point)
        .filterDate(start_date, end_date)
        .sort("CLOUD_COVER")
        .first()
    )
    return ee.Image(image)


collection = ee.ImageCollection(years.map(get_best_image))


vis_params = {"bands": ['B4', 'B3', 'B2'], "min": 0, "max": 5000}

image = ee.Image(collection.first())

# Get image lon = -115.1585 lat = 36.1500 start_year = 1984 end_year = 2011 point = ee.Geometry.Point(lon, lat) years = ee.List.sequence(start_year, end_year) def get_best_image(year): start_date = ee.Date.fromYMD(year, 1, 1) end_date = ee.Date.fromYMD(year, 12, 31) image = ( ee.ImageCollection("LANDSAT/LT05/C01/T1_SR") .filterBounds(point) .filterDate(start_date, end_date) .sort("CLOUD_COVER") .first() ) return ee.Image(image) collection = ee.ImageCollection(years.map(get_best_image)) vis_params = {"bands": ['B4', 'B3', 'B2'], "min": 0, "max": 5000} image = ee.Image(collection.first())

In [4]:

w = 0.4
h = 0.3

region = [lon + w, lat - h, lon - w, lat + h]

fig = plt.figure(figsize=(10, 8))

# use cartoee to get a map
ax = cartoee.get_map(image, region=region, vis_params=vis_params)

# add gridlines to the map at a specified interval
cartoee.add_gridlines(ax, interval=[0.2, 0.2], linestyle=":")

# add north arrow
north_arrow_dict = {
    "text": "N",
    "xy": (0.10, 0.36),
    "arrow_length": 0.15,
    "text_color": "white",
    "arrow_color": "white",
    "fontsize": 20,
    "width": 5,
    "headwidth": 15,
    "ha": "center",
    "va": "center",
}
cartoee.add_north_arrow(ax, **north_arrow_dict)

# add scale bar
scale_bar_dict = {
    'metric_distance': 4,
    'unit': "km",
    'at_x': (0.05, 0.2),
    'at_y': (0.08, 0.11),
    'max_stripes': 5,
    'ytick_label_margins': 0.25,
    'fontsize': 8,
    'font_weight': "bold",
    'rotation': 0,
    'zorder': 999,
    'paddings': {"xmin": 0.05, "xmax": 0.05, "ymin": 1.5, "ymax": 0.5},
}

cartoee.add_scale_bar(ax, **scale_bar_dict)

ax.set_title(label='Las Vegas, NV', fontsize=15)
plt.show()

w = 0.4 h = 0.3 region = [lon + w, lat - h, lon - w, lat + h] fig = plt.figure(figsize=(10, 8)) # use cartoee to get a map ax = cartoee.get_map(image, region=region, vis_params=vis_params) # add gridlines to the map at a specified interval cartoee.add_gridlines(ax, interval=[0.2, 0.2], linestyle=":") # add north arrow north_arrow_dict = { "text": "N", "xy": (0.10, 0.36), "arrow_length": 0.15, "text_color": "white", "arrow_color": "white", "fontsize": 20, "width": 5, "headwidth": 15, "ha": "center", "va": "center", } cartoee.add_north_arrow(ax, **north_arrow_dict) # add scale bar scale_bar_dict = { 'metric_distance': 4, 'unit': "km", 'at_x': (0.05, 0.2), 'at_y': (0.08, 0.11), 'max_stripes': 5, 'ytick_label_margins': 0.25, 'fontsize': 8, 'font_weight': "bold", 'rotation': 0, 'zorder': 999, 'paddings': {"xmin": 0.05, "xmax": 0.05, "ymin": 1.5, "ymax": 0.5}, } cartoee.add_scale_bar(ax, **scale_bar_dict) ax.set_title(label='Las Vegas, NV', fontsize=15) plt.show()

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
Input In [4], in <cell line: 9>()
      6 fig = plt.figure(figsize=(10, 8))
      8 # use cartoee to get a map
----> 9 ax = cartoee.get_map(image, region=region, vis_params=vis_params)
     11 # add gridlines to the map at a specified interval
     12 cartoee.add_gridlines(ax, interval=[0.2, 0.2], linestyle=":")

File ~/.local/lib/python3.9/site-packages/geemap/cartoee.py:150, in get_map(ee_object, proj, **kwargs)
    147     ee_object = ee_object.mosaic()
    149 if proj is None:
--> 150     proj = ccrs.PlateCarree()
    152 if "style" in kwargs:
    153     del kwargs["style"]

NameError: name 'ccrs' is not defined

<Figure size 720x576 with 0 Axes>

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Last update: 2022-03-14