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# - https://www.esri.com/arcgis-blog/products/story-maps/mapping/mapping-a-better-route-from-the-shire-to-mount-doom/
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# %%
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for file, url in [
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(
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"DEM_50m_Quad1.zip",
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"https://scholarworks.wm.edu/cgi/viewcontent.cgi?filename=4&article=1002&context=asoer&type=additional",
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),
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(
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"Vector_Only_Shapefiles.zip",
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"https://scholarworks.wm.edu/cgi/viewcontent.cgi?filename=0&article=1002&context=asoer&type=additional",
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),
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]:
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response = requests.get(url=url, stream=True)
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with open(file=file, mode="wb") as out_file:
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shutil.copyfileobj(response.raw, out_file)
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# %%
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# Unzip the files
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for file in ["DEM_50m_Quad1.zip", "Vector_Only_Shapefiles.zip"]:
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with zipfile.ZipFile(file=file) as z:
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for zip_info in z.infolist():
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z.extract(member=zip_info)
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# %%
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# Inspect the metadata of the GeoTIFF file
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print(pygmt.grdinfo(grid="Quad1/DEM_50m_Quad1.tif"))
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# %%
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# Load vector shapefiles into GeoDataFrame
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gdf_towns = gpd.read_file(filename="Vector_Shapefiles/Towns.shp")
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gdf_roads = gpd.read_file(filename="Vector_Shapefiles/Roads.shp")
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# %% [markdown]
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# ## Clip data to The Shire
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#
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# Middle Earth is a big place, so we'll do a spatial subset to
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# Hobbiton in The Shire to keep things simple. Using the x and y
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# coordinates and geopandas' coordinate based indexer at
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# https://geopandas.org/en/v0.10.2/docs/reference/api/geopandas.GeoDataFrame.cx.html
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# to clip the town and road geodataframe layers
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# %%
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# gdf_shire_towns = gdf_towns.query(expr="Realm == 'The Shire'")
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gdf_shire_towns = gdf_towns.cx[3_060_000:3_090_000, 2_722_000:2_740_000]
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gdf_shire_towns
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# %%
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gdf_shire_roads = gdf_roads.cx[3_060_000:3_090_000, 2_722_000:2_740_000]
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gdf_shire_roads
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# %% [markdown]
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# ## Plot the map!
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#
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# There are quite a few elements to this:
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#
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# 1. For the base layer, we'll use a parchment-like colour
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# as the background, and overlay a transparent-ish
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# copper-tone shaded DEM on top to get an aged-paper-like
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# effect
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#
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# 2. The road lines are plotted, with road name labels
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# placed to follow the road line using
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# `fig.plot(style="q...")`, see the `-Sq` option in
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# https://docs.generic-mapping-tools.org/6.2/plot.html#s
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# for more details.
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#
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# 3. Each town is plotted as a black square symbol, and
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# the corresponding label is plotted next to it, justified
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# manually so that it doesn't overlap with other elements
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#
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# 4. A title is placed on the top left corner of the map using an
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# old school cursive font. List of GMT Postscript fonts are at
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# https://docs.generic-mapping-tools.org/6.2/cookbook/postscript-fonts.html
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#
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# 5. Finally, we'll include an overly fancy directional compass
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# rose and map scale on two corners of the map.
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# %%
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fig = pygmt.Figure()
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# Plot DEM
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with pygmt.config(PS_PAGE_COLOR="#f7f3ea"):
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fig.grdimage(
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grid="Quad1/DEM_50m_Quad1.tif",
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cmap="copper",
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dpi=50,
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region=[3_060_000, 3_090_000, 2_722_000, 2_740_000], # Hobbiton
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projection="x1:200000",
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shading=True,
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transparency=50,
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)
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# Draw the road lines
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fig.plot(data=gdf_shire_roads, pen="1p,gray10", style='qn1:+l""')
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# Overlay road name one by one (using quoted line)
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for _, road in gdf_shire_roads.iterrows():
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fig.plot(
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data=road.geometry,
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