Curriculum

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[[projects:projects]]:[[voyc]]

====== Data Origin ======

cd ~/webprod/geosketch/geosketch/datasource/osmtilemill
wget https://github.com/polpols/OSM-Tilemill/archive/master.zip
unzip -j master */10m_geography_regions_polys.*
shp2pgsql -c -W LATIN1 10m_geography_regions_polys plunder.georegions >load.georegions.sql
psql -d voyccom_plunder -U voyccom_jhagstrand <load.georegions.sql




====== Previous Data Origin ======

4 dec 2022 re-create plunder database in a2hosting

database: **voyccom_plunder**

used by both plunder and geosketch
  * geosketch is used to update the data
  * plunder reads the data

Historical note: three databases were used at webfaction. 
  - jhagstrand_plunder - the original plunder database of geographical data.
  - voyc - used temporarily for building some of the plunder data js files.
  - jhagstrand_voyc - the historical political data used in voyc.

In the move from webfaction to a2hosting, those second two files were lost.
That is not critical, because they were used only temporarily.

Plunder loads its data from static js files, generated from the database.

Voyc uses google maps api, and therefore does not need geographical data.

Going forward, we will rebuild the voyccom_plunder database.
It will contain all the geographic data for drawing the map.
It will also contain political data, copied from the Voyc database. 
How will we resolve this dual maintenance of the political data?

==== Create the database ====

Create voyccom_plunder database on a2hosting/cPanel tool

Create the schema

  psql -d voyccom_plunder -U voyccom_jhagstrand -c "create schema plunder;"

==== Load in the OSM-Tilemill archive ====

This is evidently an older version of data found on natural earth data website.

  cd ~/webprod/geosketch/geosketch/datasource/osmtilemill
  wget https://github.com/polpols/OSM-Tilemill/archive/master.zip
  unzip -j master */10m_geography_regions_polys.*
  shp2pgsql -c -W LATIN1 10m_geography_regions_polys plunder.georegions >load.georegions.sql
  psql -d voyccom_plunder -U voyccom_jhagstrand <load.georegions.sql

This creates a table named georegions containing 1048 records classified by terrain type.

  select gid, scalerank, featurecla, name, namealt, region, subregion, geom from plunder.georegions;

==== Load rivers from natural earth data ====

  cd ~/webprod/geosketch/geosketch/datasource/naturalearthdata/rivers
  wget http://www.naturalearthdata.com/http//www.naturalearthdata.com/download/50m/physical/ne_50m_rivers_lake_centerlines.zip
  unzip -j ne_50m_rivers_lake_centerlines.zip
  shp2pgsql -c -W LATIN1 ne_50m_rivers_lake_centerlines plunder.rivers50 >load.rivers50.sql
  psql -d voyccom_plunder -U voyccom_jhagstrand <load.rivers50.sql


select guid, scalerank, featurecla, name, note, min_zoom, name_alt, min_label, name_en, label
from plunder.rivers50

==== Load lakes and seas data from natural earth data ====

  cd ~/webprod/geosketch/geosketch/datasource/naturalearthdata/lakes
  wget https://www.naturalearthdata.com/http//www.naturalearthdata.com/download/50m/physical/ne_50m_lakes.zip
  unzip ne_50m_lakes.zip
  shp2pgsql -c -W LATIN1 ne_50m_lakes plunder.lakes50 >load.lakes50.sql
  psql -d voyc -U jhagstrand <load.lakes50.sql



A table on this page includes names of the major seas.
https://en.wikipedia.org/wiki/List_of_political_and_geographic_borders

==== Load politial data from voyc/fpd ====

fpd.fpd contains 565,080 million rows

empire.js contains 428 rows

treasure.js contains 67 rows


Copy the fpd table from voyc to plunder

  pg_dump -Fp -b -O --column-inserts -U voyccom_jhagstrand -n fpd -f dumpvoyc.sql voyccom_voyc
  
  psql -d voyccom_plunder -U voyccom_jhagstrand <dumpvoyc.sql


==== Combine source tables into one ====

Create master table plunder.plunder.

  SET CLIENT_ENCODING TO UTF8;
  SET STANDARD_CONFORMING_STRINGS TO ON;
  create table plunder.plunder (
  id serial,
  source varchar,
  gid integer,
  name varchar,
  featureclass varchar,
  scalerank integer,
  timebegin double precision,
  timeend double precision,
  maptype integer,
  datatype integer,
  forebear integer,
  color integer
  );
  ALTER TABLE plunder.plunder ADD PRIMARY KEY (id);
  SELECT AddGeometryColumn('plunder','plunder','geom','0','GEOMETRY',2);

Load empire and treasure data.

  insert into plunder.plunder (
    source,gid,name,featureclass,scalerank,timebegin,timeend,
    maptype,datatype,forebear,color,geom)
  select 
    'fpd',id,replace(headline, E'\n', ' '),'empire',magnitude,timebegin,timeend,
    maptype,datatype,forebear,color,the_geom
  from fpd.fpd
  where editstatus < 10
  and maptype in (3,4)
  and datatype in (2,5,6,7,8,10);
  
  insert into plunder.plunder (
    source,gid,name,featureclass,scalerank,timebegin,timeend,
    maptype,datatype,forebear,color,geom)
  select 
    'fpd',id,replace(headline, E'\n', ' '),'treasure',magnitude,timebegin,timeend,
    maptype,datatype,forebear,color,the_geom
  from fpd.fpd
  where editstatus < 10
  and maptype = 2
  and datatype in (2,5,6,7,8,10)
  and timebegin < 1900;

Load osmtilemill data into plunder table.

  insert into plunder.plunder (
    source,gid,name,featureclass,scalerank,geom)
  select 
    'osmtilemill',gid,name,featurecla,scalerank,geom
    from plunder.georegions;
    
Load rivers data into plunder table.

  insert into plunder.plunder (
    source,gid,name,featureclass,scalerank,geom)
  select 
    'natearth50',gid,name,featurecla,scalerank,geom
    from plunder.rivers50;

Load lakes data into plunder table.

  insert into plunder.plunder (
    source,gid,name,featureclass,scalerank,geom)
  select 
    'natearth50',gid,name,featurecla,scalerank,geom
    from plunder.lakes50;

Massage
  update plunder.plunder set featureclass = lower(featureclass);

==== File Folder Structure ====

geosketch/sql/geo - sql files that generate data js files from plunder database\\
geosketch/sql/poli - sql files that generate data js files from voyc database \\
geosketch/datasource - original shapefiles downloaded from the interenet\\

The datasource directory is not put in github, because the data is all zipped.
But we retain a copy of it all anyway, in case it gets deleted from the cloud someday,
and we need it for recovery. 

This page documents how the the zipped shapefiles in datasource were loaded into 
the plunder database.

==== Delete the temp tables ====

Keep plunder.plunder.\\
plunder.plunder 2433 rows\\

Drop the others.\\
plunder.georegions 1048 rows\\
plunder.rivers50 478 rows\\
pluner.lakes50 412 rows\\
fpd.fpd 565,080 rows\\

drop table plunder.georegions;
drop table plunder.rivers50;
drop table pluner.lakes50;
drop table fpd.fpd;
drop schema fpd cascade;

==== Fix Rivers ====

select id, name, scalerank from plunder.plunder where id in (2009,2011);
update plunder.plunder set scalerank=6 where id in (2009,2011);

==== shp2pgsql ====

  voyccom@az1-ss8 [~/webprod]# grep -r shp2pgsql .
  ./voyc/voyc/datasets/natural earth data/ne_50m_admin_0_countries_lakes/countries.sql:shp2pgsql -W LATIN1 -w ne_50m_admin_0_countries_lakes.shp fpx >countries.sql
  ./voyc/voyc/datasets/natural earth data/ne_110m_admin_0_countries/ne_110.txt:shp2pgsql -W LATIN1 -w ne_110m_admin_0_countries.shp fpx >countries.sql
  ./plunder/plunder/sql/geo/geo-regions-notes.txt:shp2pgsql -c -W LATIN1 10m_geography_regions_polys plunder.georegions >load.georegions.sql
  ./plunder/plunder/sql/geo/water.sql:shp2pgsql -c -W LATIN1 ne_50m_lakes plunder.lakes50 >load.lakes50.sql
  ./plunder/plunder/sql/geo/water.sql:shp2pgsql -c -W LATIN1 ne_50m_ocean plunder.ocean50 >load.ocean50.sql
  ./plunder/plunder/sql/geo/rivers.sh:shp2pgsql -c -W LATIN1 ne_50m_rivers_lake_centerlines plunder.rivers50 >load.rivers50.sql
  ./curriculum/curriculum/doc/dokuwiki/data-pages/geosketch_data_origin.txt:  shp2pgsql -c -W LATIN1 10m_geography_regions_polys plunder.georegions >load.georegions.sql
  ./curriculum/curriculum/doc/dokuwiki/data-pages/geosketch_data_origin.txt:  shp2pgsql -c -W LATIN1 ne_50m_rivers_lake_centerlines plunder.rivers50 >load.rivers50.sql
  ./curriculum/curriculum/doc/dokuwiki/data-pages/geosketch_data_origin.txt:  shp2pgsql -c -W LATIN1 ne_50m_lakes plunder.lakes50 >load.lakes50.sql
  ./
  
==== Cities ====

[[projects:voyc:cities]]

from: simplemaps.com, 42,000 cities, downloaded as a csv file
  
by contrast, Natural Earth has 243 cities


==== Countries ====
  5 Jan 2023
  wget https://www.naturalearthdata.com/http//www.naturalearthdata.com/download/110m/cultural/ne_110m_admin_0_countries.zip
  unzip ne_110m_admin_0_countries.zip 
  shp2pgsql -c -W LATIN1 ne_110m_admin_0_countries plunder.ne110_admin0_countries >load.countries.sql

===== Raster Data =====

from Natural Earth

1:50m Natural Earth II, shaded relief, water (oceans), colorized ground cover\\
10800 x 5400 pixels\\
NE2_50M_SR_W.tif

1:10m Natural Earth II, same plus drainage (rivers, lakes) (5x resolution?)\\
21600 x 10800 pixels,  (2x resolution?) \\
NE2_HR_LC_SR_W_DR.tif

cut the tif images into tiles\\
tilesize pixels: 300 x 300, or 600 x 600\\
tilesize degrees: 10 x 10\\
36 columns * 18 rows = 648 tiles

  * document hires
    * file locations
    * ln -s /home/voyccom/media/data/natural_earth_data/raster/NE2_50M_SR_W.png 50mtex.png
    * to test local, start browser from the command line
<code>  
brave-browser --allow-file-access-from-files
</code>