diff --git a/Makefile b/Makefile
index 7c3e269..47117e1 100644
--- a/Makefile
+++ b/Makefile
@@ -46,6 +46,13 @@ brouter-data:
 
 osm_edit_import_pbf:
 	cd ./docker/osm_edit/; wget https://download.geofabrik.de/north-america/us/wisconsin-latest.osm.pbf -O ./osm-data/wisconsin-latest.osm.pbf
-	cd ./docker/osm_edit/; rm -rf ./docker-osmosis; git clone https://github.com/bvarick/docker-osmosis.git
-	cd ./docker/osm_edit/; docker build -t osmosis ./docker-osmosis
-	cd ./docker/osm_edit/; docker run -v ./osm-data:/osm-data osmosis osmosis --read-pbf "/osm-data/wisconsin-latest.osm.pbf" --write-xml file="/osm-data/wisconsin-latest.osm"
+	cd ./docker/osm_edit/; rm ./osm-data/wisconsin-latest.osm; docker run -v ./osm-data:/osm-data ghcr.io/bvarick/osmosis:0.49.2 osmosis --read-pbf "/osm-data/wisconsin-latest.osm.pbf" --write-xml file="/osm-data/wisconsin-latest.osm"
+
+osm_edit_refresh_base:
+	cd ./data/osm; wget https://download.geofabrik.de/north-america/us/wisconsin-latest.osm.pbf -O ./wisconsin-latest.osm.pbf
+	cd ./data/osm/osm_edit/srtm/; wget -i srtm_tiles.csv -P ./
+
+osm_edit_generate_pbf:
+	docker run -v ./data/osm:/osm ghcr.io/bvarick/osmium-tool:2.21.0 osmium apply-changes /osm/wisconsin-latest.osm.pbf /osm/osm_edit/map_edited.osm -o /osm/osm_edit/wisconsin-latest_edited.osm.pbf --overwrite
+
+osm_edit_generate_brouter:
diff --git a/README.md b/README.md
index ae43ea3..d9d85e6 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,13 @@ calculates the walking routes using OSRM.
 - `make cycle-osrm` will run *cycling_route_analysis.Rmd* which calculates the biking routes using OSRM.
 - `make cycle-brouter` will run *cycling_route_analysis_brouter.Rmd* which calculates the biking routes using brouter.
 
+## What-if analysis
+This allows you to make changes to the street network (add a bike path, reduce a lane on an arterial st) and see how it affects the routes that brouter chooses.
+This is a multi-step process:
+1. Make edits to OpenStreetMap in [JOSM](https://josm.openstreetmap.de/)
+2. Save the edited map as `map_edited.osm` in `data/osm/osm_edit/` (File -> Save As)
+3. `make osm_edit_generate_pbf` will take those edits and apply them to the `wisconsin-latest.osm.pbf` and generate `wisconsin-latest_edited.osm.pbf`
+
 ## Misc.
 - [Bike Level of Traffic Stress (LTS)](https://www.dvrpc.org/webmaps/bike-lts/analysis/)
 
diff --git a/docker/osm_edit/.gitignore b/docker/osm_edit/.gitignore
deleted file mode 100644
index e95cb01..0000000
--- a/docker/osm_edit/.gitignore
+++ /dev/null
@@ -1,9 +0,0 @@
-# Ignore everything in this directory
-*
-# Except this file
-!.gitignore
-
-# Except Dockerfile
-!Dockerfile
-
-!osm-data/
diff --git a/docker/osm_edit/osm-data/.gitignore b/docker/osm_edit/osm-data/.gitignore
deleted file mode 100644
index 5e7d273..0000000
--- a/docker/osm_edit/osm-data/.gitignore
+++ /dev/null
@@ -1,4 +0,0 @@
-# Ignore everything in this directory
-*
-# Except this file
-!.gitignore