A world map you can re-project live, entirely in the browser. Pick a coordinate framing
(Eastern / Western / Northern / Southern) and a projection. It opens on
Equal Earth, the one here that holds area — every country covers the pixels its
ground area deserves, and nothing on the map is drawn larger or smaller than it is. The
alternatives distort area to buy something else: Web Mercator trades area away for angle, drawing a place at 85°N some 41 times
its true size, and Spilhaus spends it on the sea. It is Adams' 1929 conformal
world-in-a-square, turned so that its corners land on dry ground — northern Argentina, southern
China, the Alberta–Montana border — and the cuts between them run through the continents
instead of the oceans, which leaves every ocean one body of water wrapped round Antarctica. Turn
on Ocean depth there and the whole sea floor reads at once. Spilhaus brings its
own framing, so the four above step aside while it is chosen. Its edges are glued in pairs at the
two corners in Argentina and China, so Continue past the edges (under Framing)
can stitch the cut-off seas back on: the map carries on past each edge as a copy of itself turned
a quarter-turn about that corner, and the Pacific off Japan runs on into the Pacific off
California. Spilhaus (round) is the Lagrange projection
(1779) — the conformal whole world in a circle — set in the same Spilhaus framing: the same cuts
and the same two singular points, in a disc instead of a square. It is not a map Spilhaus drew
himself. Toggle country borders (plus state/province
lines for the seven largest countries), and draw
great-circle flight paths — the preset routes, or your own: type 3-letter IATA codes such as
PEK-JFK, LHR-HND-SIN. Add terrain with Ocean depth (graded bathymetry
bands) and Land elevation (hypsometric shaded relief), or shade the land by
World regions — the United Nations geoscheme subregions (plus Antarctica), four-coloured
so no two that share a border take the same colour. Coastlines, borders & bathymetry:
Natural Earth (public domain); land elevation:
ETOPO 2022 (NOAA, public
domain); airports: OurAirports (public domain).
Sibling of the City Map Explorer at regional scale — pick a well-known geographic region and render its extent at exactly the chosen pixel size and radius, clipped to a circle. Toggle Railways for an OpenRailwayMap overlay. Switch Basemap from OpenStreetMap tiles to the projection engine to draw the same Web-Mercator crop with the vector toolkit above. Use Save PNG to export a lossless image of the visible circle.
A whole region's 行政区划 at once — every division of a territory outlined and filled over OpenStreetMap, four-coloured so no two that share a border take the same colour (the same scheme the world map above uses for its UN subregions). Eight territories sit in two groups and the toggle at the top switches the whole widget between them. Group 1 holds six regions in the same broad class — Southern England, 関東甲信越, the New York CSA, Southern California, the Wu-speaking core and Ireland, 31 to 84 thousand km² — where the interest is how differently each is carved and how differently peopled it is: the same order of land carries 7 million in Ireland and 87 million around Shanghai. Group 2 holds England against central Honshū, which are the same area to within 0.1% but cut into 47 pieces and 23. England gives the 48 ceremonial counties — the lieutenancy areas, so Yorkshire arrives in four pieces — drawn as 47, the City of London being folded into Greater London, since at the zoom where England fits the frame that 1.1-square-mile county is under a pixel wide and reads as a rendering fault. Southern England is 23 of those, the four southern statistical regions. New York is the 30 county-equivalents of the New York–Newark, NY–NJ–CT–PA Combined Statistical Area — an official delineation, built by joining metropolitan areas whose commuting flows interlock at 15% or more, which is why it reaches into Pennsylvania for a single county (Pike) and why Connecticut arrives as nine planning regions rather than eight counties: the Census Bureau swapped one for the other as county-equivalents in June 2022. Southern California is six counties — Ventura, Los Angeles, Orange, San Bernardino, Riverside, San Diego — and is the one set here cut by something that is not an administrative line. County borders are not where Southern California stops; the mountains are. Past the crest the counties run on across the Mojave and the Colorado Desert, empty ground that would more than treble the area and turn the density into fiction. So the counted region ends at the 山脊线, closing in the northwest where that line meets the Ventura–Santa Barbara county boundary at Mount Pinos. The ridge is not borrowed from anyone's boundary file. It is the drainage divide, computed from ETOPO 2022 elevation at 15 arc-seconds: flood the grid from the sea and from the closed interior sinks at once, always from the lowest cell first, and every point is claimed by whichever it reaches over the lower saddle. Where the two meet is the crest — west of it the rain reaches the Pacific, east of it it stops in the Salton Sink or a Mojave playa and evaporates. The line comes out over Mount San Gorgonio and Mount Baden-Powell to within a few hundred metres, and through Cajon Pass, which is how you know it is the right one. One honest wrinkle: it runs about 4.6 km northeast of Mount San Antonio — Baldy, the skyline itself seen from Los Angeles — because Baldy's north face still drains to the San Gabriel River and so to Long Beach. That summit is on the range crest and inside the watershed at the same time, and the line is not bent to flatter it. On the map the ridge is the heavy warm line, and it outranks the county borders it crosses; the far side of each county is still drawn, dimmed to a ghost of the same colour so the ground that counts is the ground you look at, and is in none of the numbers. It takes 95% of San Bernardino, 74% of Riverside and 30% each of Los Angeles and San Diego, while Orange and Ventura lose nothing at all. The population follows the same line rather than the county one — split by the Census Bureau's population-weighted tract centres, 20.3 of the six counties' 21.8 million live on the coastal side. Ireland gives the 32 traditional counties of the whole island, with their Irish names and provinces. 吴语区 gives the ten divisions of the Wu-speaking 太湖片 core around Shanghai — nine 地级市 plus 上海市 — each tagged with its 小片, and cut to the coastline rather than the administrative line: a Chinese prefecture's legal area includes its waters, so drawn literally 舟山市 would be one box of open sea. Here it is its 211 islands. Two caveats there — that source omits 上海市's real exclaves in Anhui and Jiangsu, and dialect boundaries do not honour prefecture lines, so 杭州市's western counties (建德, 淳安) speak 徽语/严州话, not 太湖片 Wu at all. Japan gives the 23 都府県 of central Honshū — 関東, 中部 and 近畿, each tagged with its 地方 — and 関東甲信越 is ten of them: 関東 plus 甲信越, which is 甲斐 (山梨), 信濃 (長野) and 越後 (新潟), a grouping still named after the 令制国 it replaced. It is an administrative region rather than a felt one — ministry bureaus and NHK use exactly these ten — where 関東 alone, half the size, is the identity. Both Japanese sets are 1:10m data and so coarser than the rest, and 東京都 reaches 1,886 km southeast to 南鳥島: those islands are drawn, but the opening view frames the mainland. Hover a division for its name and area, click it to zoom in, click it again to come back out. Names labels them on the map — all forms stacks every script a territory carries, so a Japanese prefecture reads 東京都 / とうきょうと / Tōkyō-to, and an Irish county carries its Irish name; name only drops back to one line where that crowds. Compare with is the antidote to the projection: Web Mercator inflates area by sec²(latitude), so an English county at 53°N is blown up 2.8× while a Chinese prefecture at 30°N is blown up only 1.3×. Drawn plainly, 杭州市 is 95% larger than North Yorkshire and yet renders about 6% smaller. Pick any division and its outline is drawn over the map at its true ground size, wherever you drag it — the shape is re-projected as it moves, so it always covers the area it really has. Save PNG exports the visible frame, compared outline included. Boundaries: OS Boundary-Line (© Crown copyright and database right 2026, OGL v3); Tailte Éireann (CC BY 4.0); OSNI Open Data (OGL v3); for 吴语区, 高德 via 阿里云 DataV.GeoAtlas — 仅供学习和交流使用, study and exchange only; and for Japan, Natural Earth 1:10m admin-1 (public domain). Basemap: OpenStreetMap contributors (ODbL).