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Add cookbook example for adding and removing features with tile-join

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Eric Fischer 2018-12-20 15:04:35 -08:00
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27
README.md
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@ -238,6 +238,33 @@ As above, but
* `-l counties`: Specify the layer name instead of letting it be derived from the source file names
### Selectively remove and replace features (Census tracts) to update a tileset
```
# Retrieve and tile California 2000 Census tracts
curl -L -O https://www2.census.gov/geo/tiger/TIGER2010/TRACT/2000/tl_2010_06_tract00.zip
unzip tl_2010_06_tract00.zip
ogr2ogr -f GeoJSON tl_2010_06_tract00.shp.json tl_2010_06_tract00.shp
tippecanoe -z11 -o tracts.mbtiles -l tracts tl_2010_06_tract00.shp.json
# Create a copy of the tileset, minus Alameda County (FIPS code 001)
tile-join -j '{"*":["none",["==","COUNTYFP00","001"]]}' -f -o tracts-filtered.mbtiles tracts.mbtiles
# Retrieve and tile Alameda County Census tracts for 2010
curl -L -O https://www2.census.gov/geo/tiger/TIGER2010/TRACT/2010/tl_2010_06001_tract10.zip
unzip tl_2010_06001_tract10.zip
ogr2ogr -f GeoJSON tl_2010_06001_tract10.shp.json tl_2010_06001_tract10.shp
tippecanoe -z11 -o tracts-added.mbtiles -l tracts tl_2010_06001_tract10.shp.json
# Merge the filtered tileset and the tileset of new tracts into a final tileset
tile-join -o tracts-final.mbtiles tracts-filtered.mbtiles tracts-added.mbtiles
```
The `-z11` option explicitly specifies the maxzoom, to make sure both the old and new tilesets have the same zoom range.
The `-j` option to `tile-join` specifies a filter, so that only the desired features will be copied to the new tileset.
This filter excludes (using `none`) any features whose FIPS code (`COUNTYFP00`) is the code for Alameda County (`001`).
Options
-------

28
man/tippecanoe.1
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@ -279,6 +279,34 @@ As above, but
.IP \(bu 2
\fB\fC\-l counties\fR: Specify the layer name instead of letting it be derived from the source file names
.RE
.SS Selectively remove and replace features (Census tracts) to update a tileset
.PP
.RS
.nf
# Retrieve and tile California 2000 Census tracts
curl \-L \-O https://www2.census.gov/geo/tiger/TIGER2010/TRACT/2000/tl_2010_06_tract00.zip
unzip tl_2010_06_tract00.zip
ogr2ogr \-f GeoJSON tl_2010_06_tract00.shp.json tl_2010_06_tract00.shp
tippecanoe \-z11 \-o tracts.mbtiles \-l tracts tl_2010_06_tract00.shp.json
# Create a copy of the tileset, minus Alameda County (FIPS code 001)
tile\-join \-j '{"*":["none",["==","COUNTYFP00","001"]]}' \-f \-o tracts\-filtered.mbtiles tracts.mbtiles
# Retrieve and tile Alameda County Census tracts for 2010
curl \-L \-O https://www2.census.gov/geo/tiger/TIGER2010/TRACT/2010/tl_2010_06001_tract10.zip
unzip tl_2010_06001_tract10.zip
ogr2ogr \-f GeoJSON tl_2010_06001_tract10.shp.json tl_2010_06001_tract10.shp
tippecanoe \-z11 \-o tracts\-added.mbtiles \-l tracts tl_2010_06001_tract10.shp.json
# Merge the filtered tileset and the tileset of new tracts into a final tileset
tile\-join \-o tracts\-final.mbtiles tracts\-filtered.mbtiles tracts\-added.mbtiles
.fi
.RE
.PP
The \fB\fC\-z11\fR option explicitly specifies the maxzoom, to make sure both the old and new tilesets have the same zoom range.
.PP
The \fB\fC\-j\fR option to \fB\fCtile\-join\fR specifies a filter, so that only the desired features will be copied to the new tileset.
This filter excludes (using \fB\fCnone\fR) any features whose FIPS code (\fB\fCCOUNTYFP00\fR) is the code for Alameda County (\fB\fC001\fR).
.SH Options
.PP
There are a lot of options. A lot of the time you won't want to use any of them