Remove Web WorldWind support (#275)

It was always kind of flaky and is now broken on the docs and in Jupyter
Lab. We can try better version of this later on. Right now, it's not
easy to test and maintain and shouldn't be in the code base.

Author: leouieda

Makefile

@@ -42,6 +42,7 @@ lint:
 
 clean:
 	find . -name "*.pyc" -exec rm -v {} \;
+	find . -name "*~" -exec rm -v {} \;
 	rm -rvf build dist MANIFEST *.egg-info __pycache__ .coverage .cache
 	rm -rvf $(TESTDIR)
 	rm -rvf baseline

doc/sphinxext.rst

@@ -39,19 +39,6 @@ code. For example:
     fig.show()
 
 
-The HTML rich display features that work in Jupyter notebooks also work for the
-extension:
-
-.. gmt-plot::
-
-    quakes = pygmt.datasets.load_usgs_quakes()
-
-    fig2 = pygmt.Figure()
-    fig2.plot(x=quakes.longitude, y=quakes.latitude, region=[-180, 180, -90, 90],
-              projection="X10id", color="yellow", style="c0.2c", pen="black")
-    fig2.show(method="globe")
-
-
 Installing
 ----------
 

doc/tutorials/first-steps.ipynb

@@ -97,9 +97,7 @@
     "This is useful when using the Python shell or IPython terminal app. \n",
     "However, **this command will not interrupt your Python process**. \n",
     "So using it in a Python script will not work because the script will finish and delete the generated previews.\n",
-    "Use `fig.savefig` to save the figure to a file instead (see below).\n",
-    "\n",
-    "There is also the option of inserting the figure in an **interactive globe** using [NASA's WorldWind Web](https://worldwind.arc.nasa.gov/web/). See option `external='globe'` in the examples below."
+    "Use `fig.savefig` to save the figure to a file instead (see below)."
    ]
   },
   {
@@ -186,7 +184,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.6.7"
   }
  },
  "nbformat": 4,

doc/tutorials/plot-data-points.ipynb

@@ -235,35 +235,6 @@
     "         cmap='viridis', style='cc', pen='black')\n",
     "fig.show()"
    ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Interactive map previews"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "Let's preview this map using the **interactive globe**. In this case, we don't need the frame or color in the oceans. We must also use a **Cartesian projection** (X) and degrees (d) for plot units so that the figure can be aligned with the globe."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "fig = pygmt.Figure()\n",
-    "fig.coast(region=quakes_region, projection='X6id/6id', land='gray')\n",
-    "fig.plot(x=quakes.longitude, y=quakes.latitude, \n",
-    "         sizes=0.02*2**quakes.magnitude,\n",
-    "         color=quakes.depth_km/quakes.depth_km.max(),\n",
-    "         cmap='viridis', style='cc', pen='black')\n",
-    "fig.show(method='globe')"
-   ]
   }
  ],
  "metadata": {
@@ -282,7 +253,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.6.7"
   }
  },
  "nbformat": 4,

pygmt/figure.py

@@ -20,7 +20,6 @@
     kwargs_to_strings,
     launch_external_viewer,
     unique_name,
-    worldwind_show,
 )
 
 
@@ -222,7 +221,7 @@ def savefig(
         if show:
             launch_external_viewer(fname)
 
-    def show(self, dpi=300, width=500, method="static", globe_center=None):
+    def show(self, dpi=300, width=500, method="static"):
         """
         Display a preview of the figure.
 
@@ -235,10 +234,6 @@ def show(self, dpi=300, width=500, method="static", globe_center=None):
         browser). Note that the external viewer does not block the current
         process, so this won't work in a script.
 
-        If using the ``'globe'`` preview, use a Cartesian projection (``'X'``)
-        and specify degrees as size units (e.g. ``projection='X3id/3id'``).
-        Otherwise, the figure may not align with the globe.
-
         Parameters
         ----------
         dpi : int
@@ -249,34 +244,17 @@ def show(self, dpi=300, width=500, method="static", globe_center=None):
         method : str
             How the figure will be displayed. Options are (1) ``'static'``: PNG
             preview (default); (2) ``'external'``: PDF preview in an external
-            program; (3) ``'globe'``: interactive 3D globe in the notebook
-            using `NASA WorldWind Web <https://worldwind.arc.nasa.gov>`__ (only
-            use if plotting lon/lat data).
-        globe_center : None or tuple = (lon, lat, height[m])
-            The coordinates used to set the view point for the globe preview.
-            If None, will automatically determine a view based on the plot
-            region. Only used if ``method='globe'``.
+            program.
 
         Returns
         -------
-        img : IPython.display.Image or IPython.display.Javascript
+        img : IPython.display.Image
             Only if ``method != 'external'``.
 
         """
-        if method not in ["static", "external", "globe"]:
+        if method not in ["static", "external"]:
             raise GMTInvalidInput("Invalid show method '{}'.".format(method))
-        if method == "globe":
-            png = self._preview(
-                fmt="png", dpi=dpi, anti_alias=True, as_bytes=True, transparent=True
-            )
-            img = worldwind_show(
-                image=png,
-                width=width,
-                region=self.region,
-                canvas_id=self._name,
-                globe_center=globe_center,
-            )
-        elif method == "external":
+        if method == "external":
             pdf = self._preview(fmt="pdf", dpi=dpi, anti_alias=False, as_bytes=False)
             launch_external_viewer(pdf)
             img = None

pygmt/helpers/__init__.py

@@ -10,4 +10,3 @@
     is_nonstr_iter,
     launch_external_viewer,
 )
-from .worldwind import worldwind_show