diff --git a/roles/osm-vector-maps/README.md b/roles/osm-vector-maps/README.md
index e5acf736e..1aff222c9 100644
--- a/roles/osm-vector-maps/README.md
+++ b/roles/osm-vector-maps/README.md
@@ -23,6 +23,18 @@
 
 5. **Drag-and-Drop Map Overlays** — try this by dragging and dropping any relevant GeoJSON file onto the IIAB Maps (http://box/maps) in your browser!  For example try this GeoJSON file, to explore the shape of gerrymandered US Congressional districts: https://eric.clst.org/assets/wiki/uploads/Stuff/gz_2010_us_500_11_20m.json
 
-6. Similarly but separately: Students can _Right-Click_ on IIAB Maps (http://box/maps) to **add descriptions and photos** of local points of interest<!-- — and then save and restore them using their local browser-->.  Choose "Add Data Point" after right-clicking, and then later "Export Points" to share with others.  [CAN ANYBODY SUGGEST STUDENT/TEACHER OUTDOOR EXPLORATION / GEOSPATIAL ADVENTURE TIPS THAT WORK WELL WITH STUDENT PHONES?]
 
 #### Please also see the IIAB Maps doc: https://github.com/iiab/iiab/wiki/IIAB-Maps
+
+#### Notes on upgrading from maps 7.2 to maps 7.3
+
+The format of the map-catalog.json has changed. And the programs need to be updated also. This can be accomplished by the following:
+```
+     cd /library/www/
+     rm -rf osm-vector-maps/
+     vim /etc/iiab/iiab_state.yml  (and delete the line osm-vector-maps)
+     git remote add ghunt git@github.com:/georgejhunt/iiab
+     git fetch --all
+     git checkout -b maps7.3 ghunt/maps7.3
+     ./runroles osm-vector-maps
+```
diff --git a/roles/osm-vector-maps/defaults/main.yml b/roles/osm-vector-maps/defaults/main.yml
index 5c8f219ba..e32bc6a1c 100644
--- a/roles/osm-vector-maps/defaults/main.yml
+++ b/roles/osm-vector-maps/defaults/main.yml
@@ -8,12 +8,15 @@
 # If nec, change them by editing /etc/iiab/local_vars.yml prior to installing!
 
 # The following soft coded variables allow testing, before pulling PR's into master
-osm_repo_url: https://raw.githubusercontent.com/iiab/maps
-#osm_repo_url: https://raw.githubusercontent.com/georgejhunt/maps
-maps_branch: 'master'    # Quotes not required
-#maps_branch: '7.2-maps'
+# osm_repo_url: https://raw.githubusercontent.com/iiab/maps
+osm_repo_url: https://raw.githubusercontent.com/georgejhunt/maps
+#maps_branch: 'master'    # Quotes not required
+maps_branch: 'maps7.3'
 
 # soft code sources
 archive_org_url: https://archive.org/download
-map_catalog_url: http://download.iiab.io/content/OSM/vector-tiles
+#map_catalog_url: http://download.iiab.io/content/OSM/vector-tiles
+map_catalog_url: http://timmoody.com/iiab-files/maps
 satellite_version: satellite_z0-z9_v3.mbtiles    # 2021-12-20: Var unused, but hard-coded in 11 places within https://github.com/iiab/iiab-admin-console -- #3077 discusses map-catalog.json & adm-map-catalog.json
+installer_planet: planet_z0-z6_2020.mbtiles
+installer_satellite: satellite_z0-z6_2020.mbtiles
diff --git a/roles/osm-vector-maps/tasks/install.yml b/roles/osm-vector-maps/tasks/install.yml
index c57a07700..3bb9e5176 100644
--- a/roles/osm-vector-maps/tasks/install.yml
+++ b/roles/osm-vector-maps/tasks/install.yml
@@ -85,27 +85,27 @@
     - searchapi.php
     - tileserver.php
 
-- name: Download 34MB {{ map_catalog_url }}/planet_z0-z6_2019.mbtiles to {{ vector_map_path }}/installer/ -- for map installer
+- name: Download 34MB {{ map_catalog_url }}/{{ installer_planet }} to {{ vector_map_path }}/installer/ -- for map installer
   get_url:
-    url: "{{ map_catalog_url }}/planet_z0-z6_2019.mbtiles"
+    url: "{{ map_catalog_url }}/{{ installer_planet }}"
     dest: "{{ vector_map_path }}/installer/"
     timeout: "{{ download_timeout }}"
 
-- name: Symlink {{ vector_map_path }}/installer/detail.mbtiles -> {{ vector_map_path }}/installer/planet_z0-z6_2019.mbtiles
+- name: Symlink {{ vector_map_path }}/installer/detail.mbtiles -> {{ vector_map_path }}/installer/{{ installer_planet }}
   file:
-    src: "{{ vector_map_path }}/installer/planet_z0-z6_2019.mbtiles"
+    src: "{{ vector_map_path }}/installer/{{ installer_planet }}"
     path: "{{ vector_map_path }}/installer/detail.mbtiles"
     state: link
 
-- name: Symlink {{ vector_map_path }}/viewer/tiles/planet_z0-z6_2019.mbtiles -> {{ vector_map_path }}/installer/planet_z0-z6_2019.mbtiles
+- name: Symlink {{ vector_map_path }}/viewer/tiles/{{ installer_planet }} -> {{ vector_map_path }}/installer/{{ installer_planet }}
   file:
-    src: "{{ vector_map_path }}/installer/planet_z0-z6_2019.mbtiles"
-    path: "{{ vector_map_path }}/viewer/tiles/planet_z0-z6_2019.mbtiles"
+    src: "{{ vector_map_path }}/installer/{{ installer_planet }}"
+    path: "{{ vector_map_path }}/viewer/tiles/{{ installer_planet }}"
     state: link
 
-- name: Download abbreviated satellite images from {{ map_catalog_url }}/satellite_z0-z6_v3.mbtiles to {{ vector_map_path }}/viewer/tiles/
+- name: Download abbreviated satellite images from {{ map_catalog_url }}/{{ installer_satellite }} to {{ vector_map_path }}/viewer/tiles/
   get_url:
-    url: "{{ map_catalog_url }}/satellite_z0-z6_v3.mbtiles"
+    url: "{{ map_catalog_url }}/{{ installer_satellite }}"
     dest: "{{ vector_map_path }}/viewer/tiles/"
     timeout: "{{ download_timeout }}"