kadolor commented on code in PR #128:
URL: https://github.com/apache/sedona-db/pull/128#discussion_r2370356102
##########
docs/crs-examples.md:
##########
@@ -17,10 +15,20 @@
under the License.
-->
-# Coordinate Reference System (CRS) Examples
+# Joining Geospatial Data with Different CRSs.
Review Comment:
@MrPowers The goal was to align the title with the existing navigation items
and to be clearer about what the example would teach the reader.
##########
docs/crs-examples.ipynb:
##########
@@ -5,14 +5,30 @@
"id": "91910e50-a5ae-4d5a-a431-62ac5fbc11ca",
"metadata": {},
"source": [
- "# Coordinate Reference System (CRS) Examples\n",
+ "# Joining Geospatial Data with Different CRSs.\n",
"\n",
- "This example demonstrates how one table with an EPSG 4326 CRS cannot be
joined with another table that uses EPSG 3857."
+ "This example demonstrates how one table with an EPSG 4326 CRS cannot be
joined with another table that uses EPSG 3857.\n",
+ "\n",
+ "A Coordinate Reference System (CRS) defines how the two-dimensional
coordinates of a map relate to real locations on Earth. Operations like spatial
joins, distance calculations, or overlays require all datasets to be in the
same CRS to produce accurate results.\n",
+ "\n",
+ "This notebook demonstrates a key feature of SedonaDB: it protects users
from generating incorrect results by raising an error if you attempt to join
tables with mismatched coordinate reference systems."
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "id": "84493c4d",
+ "metadata": {},
+ "source": [
+ "We will walk through two examples:\n",
+ "\n",
+ "- Joining countries (using EPSG:4326, a geographic CRS) and cities (using
EPSG:3857, a projected CRS).\n",
+ "\n",
+ "- Finding all the building footprints within the state of Vermont by
joining two large datasets with different coordinate reference systems."
Review Comment:
Done.
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