General
General features, World maps:
- Topographic map centered on 0°N 0°E.
- Horizontal scale (at equator): maps 11,111 m/pixel, videos 31,250 m/pixel.
- Altitude scale: 1.0 m/gray scale step, linear from black (RGB 0,0,0) = 0 m above sea level to white (RGB 255,255,255) = 255 m or more above sea level.
- Coverage: maps 40,000x20,000 km in 3,600x1,800 pixels, videos 40,000x20,000 km in 1,280x640 pixels, 1 m/s sea level rise, 0-65 m.
General features, Sweden maps:
- Topographic map centered on Sweden.
- Horizontal scale (Swedish SWEREF 99 TM): maps 500 m/pixel, videos 1,250 m/pixel.
- Altitude scale (Swedish RH 2000): 1.0 m/gray scale step, linear from black (RGB 0,0,0) = 0 m above sea level to white (RGB 255,255,255) = 255 m or more above sea level.
- Coverage: maps 800x1,600 km in 1,600x3,200 pixels, videos 800x1,600 km in 640x1,280 pixels, 1 m/s sea level rise, 0-65 m.
General features, commune maps:
- Topographic map centered on commune centers of communes potentially affected by sea level rise.
- Horizontal scale (Swedish SWEREF 99 TM): 50 m/pixel.
- Altitude scale (Swedish RH 2000): 1.0 m/gray scale step, linear from black (RGB 0,0,0) = 0 m above sea level to white (RGB 255,255,255) = 255 m or more above sea level.
- Coverage: maps 128x128 km in 2,560x2,560 pixels, videos 64x36 km in 1,280x720 pixels, 1 m/s sea level rise, 0-65 m.
Map colors
Color scheme for various features of the maps:
- Grays: land above sea level.
- Medium blue: sea.
- Light blue: present lakes.
- Violet: flooded after sea level rise.
- Greenish (semi-transparent): commune/country/area borders.
- Light green (text): commune/country/area names.
- Reddish (semi-transparent): urban area/city markers.
- Yellow (text): urban area/city names and info.
Population
Population size of cities, World maps:
- City markers: maps 1 pixel/500,000 residents, videos 1 pixel/1,500,000 residents, including area obscured by water.
- City names, font size by population:
- 10p: 1,000,000-29,999,999.
Population size of urban areas, Sweden maps:
- Urban area markers: 1 pixel/10,000 residents 2016, including area obscured by water.
- Urban area names, font size by population 2016:
- 10p: 20,000-59,999.
- 12p: 60,000-199,999.
- 14p: 200,000-599,999.
- 18p: 600,000-1,999,999.
Population size of urban areas, commune maps:
- Urban area markers: 1 pixel/100 residents 2016, including area obscured by water.
- Urban area names, font size by population 2016:
- 10p: 200-599.
- 12p: 600-1,999.
- 14p: 2,000-5,999.
- 18p: 6,000-19,999.
- 20p: 20,000-59,999.
- 24p: 60,000-199,999.
- 28p: 200,000-599,999.
- 36p: 600,000-1,999,999.
Sea level rise
Sea level rise for static map images and events that could cause them:
- 00.0 m: today.
- 01.0 m: plausible rise until 2100 according to an IPCC report 2013.
- 02.5 m: possible rise until 2100 according to a NOAA report 2017.
- 04.8 m: if West Antarctic ice sheet melts.
- 07.2 m: if Greenland ice sheet melts.
- 12.0 m: if West Antarctic and Greenland ice sheets melt.
- 15.0 m: if all ice sheets outside East Antarctic melt.
- 20.0 m: if all ice sheets outside East Antarctic melt, plus 10% of East Antarctic.
- 25.0 m: if all ice sheets outside East Antarctic melt, plus 20% of East Antarctic.
- 30.0 m: if all ice sheets outside East Antarctic melt, plus 30% of East Antarctic.
- 35.0 m: if all ice sheets outside East Antarctic melt, plus 40% of East Antarctic.
- 40.0 m: if all ice sheets outside East Antarctic melt, plus 50% of East Antarctic.
- 45.0 m: if all ice sheets outside East Antarctic melt, plus 60% of East Antarctic.
- 50.0 m: if all ice sheets outside East Antarctic melt, plus 70% of East Antarctic.
- 55.0 m: if all ice sheets outside East Antarctic melt, plus 80% of East Antarctic.
- 60.0 m: if all ice sheets outside East Antarctic melt, plus 90% of East Antarctic.
- 65.0 m: if all ice sheets melt.
Consequences
Tables showing land loss and displacement of populations.
- Tables showing displacement of population are based on average number of residents per square in a 1 km2 grid.
- If there are both high, densely populated areas and low, sparingly populated areas within the same square, the estimate may be too high.
- If there are both low, densely populated areas and high, sparingly populated areas within the same square, the estimate may be too low.
- Flooding of underground structures, such as basements, pipes for water, sewage and central heating, and cables for electricity, telephone and Internet, may force displacement before the land surface is flooded, and hence a too low estimate.
Sources
Maps and tables are created from open geodata:
- Topography from "GSD-Höjddata, grid 50+", CC BY from Lantmäteriet.
- Sea borders from "Havsomr_y_2012_2", CC BY from SMHI.
- Lake borders from "Vy_y_2012_2", CC BY from SMHI.
- Commune borders and names from "GSD-Översiktskartan vektor", CC BY from Lantmäteriet.
- Urban area positions and names from "Tätorter 2016; befolkning, landareal, andel som överlappas av fritidshusområden", source SCB (Statistiska centralbyrån).
- Population density grid from "Total befolkning per ruta" (2016-12-31, 1 km2), source SCB (Statistiska centralbyrån).
- World topography grid from The GEBCO_2014 Grid, version 20150318, GEBCO (General Bathymetric Chart of the Oceans).
- Country borders and names from TM_WORLD_BORDERS-0.1, thematicmapping.org.
- World city data from GeoNames Gazetteer allCountries, CC BY from GeoNames.
- World population data from GHS population grid, derived from GPW4, multitemporal (1975, 1990, 2000, 2015). European Commission, Joint Research Centre (JRC) [Dataset] PID.