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Update roles/osm-vector-maps/README.md

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A Holt 2020-09-30 08:25:18 -04:00 • committed by GitHub
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1. Some variables have newer meanings:
1. `osm_vector_maps_install` in `/etc/iiab/local_vars.yml` means install the map program (about 40MB).
2. `osm_vector_maps_enabled` in `/etc/iiab/local_vars.yml` was not in use. [CAN WE SPELL OUT WHY? SEE tasks/nginx.yml AND TKTS BELOW]
3. `osm_vector_maps_installed` in `/etc/iiab/iiab_state.yml` means a functioning world map to with 7 levels of zoom (z0-z6) has been installed. [NO LONGER 2.8GB & HOURLONG WAIT TO DOWNLOAD 10 ZOOM LEVELS PER #2484, PR #2486, PR #2487 ETC]
3. `osm_vector_maps_installed` in `/etc/iiab/iiab_state.yml` means a functioning world map to with 7 levels of zoom (z0-z6) has been installed. [LIKELY EXPLANATION: THE HOURLONG WAIT FOR 2.8 GB TO DOWNLOAD 10 ZOOM LEVELS WAS REDUCED, TO A PREVIEW OF 7 ZOOM LEVELS, PER #2484, PR #2486, PR #2487 ETC]
2. There's an "Install IIAB Maps" page (http://box/osm-vector-maps/installer/) separate from the Admin Console, to help you download Map Pack(s) for your favorite continents, and Hi-Res Satellite Photo Regions serving local communities.
1. Hi-Res Satellite Photo Regions are 'squares' with 4 more levels of satellite photo zoom (i.e. zoom levels 10-13) giving you 16X the resolution (i.e. 19 x 19 m pixels) and 256X more photographic information density.
2. As compared to Lo-Res Satellite Photos i.e. zooms level 0-9 (305 x 305 m pixels) everywhere else on the planet.