Differences

This shows you the differences between two versions of the page.

--- geosketch_data_analysis [2022/12/04 20:49] – [scalerank] jhagstrand
+++ geosketch_data_analysis [2023/01/12 01:36] (current) – removed jhagstrand
@@ Line 1: / Line 1: @@
-====== Geosketch Data Analysis ======
-plunder database
-table georegions, originally 1048 records from osmtilemill shapefiles
-attributes featureclass and scalerank
-==== scalerank ====
-scale = the number of pixels in the radius of the globe, used for realtime map drawing
-scalerank = a number from 1 to 6, indicating the relative magnitude of the feature
-==== featureclass ====
-feature classes:
-	basin
-	coast
-	continent
-	delta
-	depression
-	desert*
-	foothills*
-	geoarea
-	gorge
-	island
-	island group
-	isthmus
-	lowland
-	pen/cape
-	peninsula
-	plain*
-	plateau*
-	range/mtn*
-	tundra*
-	valley*
-	wetlands*
-* classes used in the original plunder
-===== water =====
-loaded from Natural Earth Data, 50m set
-  * oceans
-  * seas
-  * lakes
-  * rivers
-==== rivers ====
-A. examine rivers
-:50m 460 rivers, scalerank 1 thru 6, 42 rows in our target geo
-#all rivers combined, almost 1 MB
-psql -t -d voyc -U jhagstrand <rivers.sql >../json/rivers.js
-==== lakes ====
-==== seas ====
-A table on this page includes names of the major seas.
-https://en.wikipedia.org/wiki/List_of_political_and_geographic_borders
-Caspian Sea is currently missing.
-Maybe needed for labeling or hit testing.
-Examples
-  * Mediterranean
-  * Bay of Bengal
-  * Arabian Sea
-  * Carribean
-==== oceans ====
-Natural Earth's Ocean file has only one polygon.
-We don't currently have an oceans data.
-We just paint the background blue, and start drawing on top of it.
-If we want to do labeling or hit testing by ocean name,
-then we will need a polygon
-for each named ocean.
-oceans: Pacific, Atlantic, Indian\\
-optional: Arctic, Southern\\
-optional: North Pacific, South Pacific, North Atlantic, South Atlantic
-arctic and southern oceans are each a circle, or just explicitly test for north of 80
-===== Political data ======
-pulled from database voyc, table fpd
-  * empire - polygon
-  * treasure - point