added tile show method

Signed-off-by: Eric Culbertson <[email protected]>

Author: Eric Culbertson

pyrasterframes/src/main/python/pyrasterframes/rf_ipython.py

@@ -40,16 +40,7 @@ def tile_to_png(tile, lower_percentile=1, upper_percentile=99, title=None, fig_s
     canvas = FigureCanvas(fig)
     axis = fig.add_subplot(1, 1, 1)
 
-    arr = tile.cells
-
-    def normalize_cells(cells, lower_percentile=lower_percentile, upper_percentile=upper_percentile):
-        assert upper_percentile > lower_percentile, 'invalid upper and lower percentiles'
-        lower = np.percentile(cells, lower_percentile)
-        upper = np.percentile(cells, upper_percentile)
-        cells = np.clip(cells, lower, upper)
-        return (cells - lower) / (upper - lower)
-
-    axis.imshow(normalize_cells(arr))
+    tile.show(lower_percentile, upper_percentile, axis=axis)
     axis.set_aspect('equal')
     axis.xaxis.set_ticks([])
     axis.yaxis.set_ticks([])
@@ -69,7 +60,7 @@ def tile_to_html(tile, fig_size=None):
     """ Provide HTML string representation of Tile image."""
     import base64
     b64_img_html = '<img src="data:image/png;base64,{}" />'
-    png_bits = tile_to_png(tile, fig_size)
+    png_bits = tile_to_png(tile, fig_size=fig_size)
     b64_png = base64.b64encode(png_bits).decode('utf-8').replace('\n', '')
     return b64_img_html.format(b64_png)
 

pyrasterframes/src/main/python/pyrasterframes/rf_types.py

@@ -358,12 +358,37 @@ def dimensions(self):
         """ Return a list of cols, rows as is conventional in GeoTrellis and RasterFrames."""
         return [self.cells.shape[1], self.cells.shape[0]]
 
-
     def _repr_png_(self):
         """Provide default PNG rendering in IPython and Jupyter"""
         from pyrasterframes.rf_ipython import tile_to_png
         return tile_to_png(self)
 
+    def show(self, lower_percentile=1, upper_percentile=99, axis=None):
+            """"""
+
+            if axis is None:
+                import matplotlib.pyplot as plt
+                axis = plt.gca()
+
+            arr = self.cells
+
+            def normalize_cells(cells, lower_percentile=lower_percentile, upper_percentile=upper_percentile):
+                assert upper_percentile > lower_percentile, 'invalid upper and lower percentiles'
+                lower = np.percentile(cells, lower_percentile)
+                upper = np.percentile(cells, upper_percentile)
+                cells_clipped = np.clip(cells, lower, upper)
+                return (cells_clipped - lower) / (upper - lower)
+
+            axis.set_aspect('equal')
+            axis.xaxis.set_ticks([])
+            axis.yaxis.set_ticks([])
+
+            axis.imshow(normalize_cells(arr))
+
+            return axis
+
+
+
 
 class TileUDT(UserDefinedType):
     @classmethod