Script to write nz-building-outlines to geoparquet 0.4.0 (#87)

* Script to write nz-building-outlines to parquet

* Fix script, update dependencies

* Update readme

* Revert pyogrio

* Ignore "does not contain geometry" warnings

* changes from review + use projjson

* Save a few bytes by removing whitespace

.gitignore

@@ -0,0 +1,2 @@
+# Ignore GeoPackage file used in conversion to GeoParquet
+*.gpkg*

scripts/README.md

@@ -6,7 +6,17 @@ The scripts in this directory use [Poetry](https://github.com/python-poetry/poet
 
 To install Poetry, follow the Poetry [installation guide](https://python-poetry.org/docs/#installation).
 
-To install from the lockfile, run `poetry install`. To update the lockfile (such as when you add a new dependency) run `poetry update`.
+To install from the lockfile:
+
+```
+poetry install
+```
+
+To update the lockfile (such as when you add a new dependency):
+
+```
+poetry update
+```
 
 To run a script, prefix it with `poetry run`. For example:
 
@@ -15,3 +25,22 @@ poetry run python update_example_schemas.py
 ```
 
 Using `poetry run` ensures that you're running the python script using _this_ local environment, not your global environment.
+
+### nz-building-outlines to Parquet
+
+```bash
+poetry run python write_nz_building_outline.py \
+    --input nz-building-outlines.gpkg \
+    --output nz-building-outlines.parquet \
+    --compression SNAPPY
+```
+
+#### Recompile pygeos
+
+Poetry doesn't currently have a way to force installing a package from source.
+To make the script run faster, you can reinstall pygeos manually in the
+virtualenv:
+
+```
+poetry run pip install -U --force-reinstall pygeos --no-binary pygeos
+```