The Equal Earth map projection is a new equal-area pseudocylindrical for world maps. It inspired by the widely used Robinson projection, but unlike retains relative size of areas. equations are simple to implement and fast evaluate. Continental outlines shown in visually pleasing balanced way.

Many small-scale map projections exist, and they have different shapes distortion characteristics. World are mainly chosen based on their properties the personal preferences of cartographers. Very little is known about projection map-readers; only two studies addressed this question so far. This article presents a user study among map-readers trained cartographers that tests for world projections. The paired comparison test nine commonly used reveals in our prefer Robinson Plate Carrée...

The selection of map projections is difficult and confusing for many. This article introduces Projection Wizard, an online projection tool available at projectionwizard.org that helps mapmakers select projections. user selects the desired distortion property, area to be mapped on interactive web map. Wizard then proposes a projection, along with parameters (such as standard parallels). also creates preview proposed provides corresponding code in PROJ.4 format, if applicable. automated...

Abstract The Natural Earth projection is a new for representing the entire on small-scale maps. It was designed in Flex Projector, specialized software application that offers graphical approach creation of projections. original defines length and spacing parallels tabular form every five degrees increasing latitude. pseudocylindrical projection, neither conformal nor equal-area. In definition, piece-wise cubic spline interpolation used to project intermediate values do not align with...

AbstractThe recently introduced adaptive composite map projection technique changes the to geographic area shown on a map. It is meant as replacement for commonly used web Mercator projection, which grossly distorts areas when representing entire world. The original equal-area version of uses Lambert azimuthal regional maps and three alternative projections world maps. Adaptive can include variety other transformation between Wagner's method. To select most suitable pseudocylindrical...

The virtual globe is the default visualization for Digital Earth applications, but it can only show one half of Earth. This article introduces user-adjustable, on-the-fly projection georeferenced raster images web mapping and GIS applications. technique allows users to center a map on arbitrary locations, while still seeing entire surface. Modern libraries apply transformations vector data in browser, they do not currently support at interactive frame rates. We use cross-platform WebGL (Web...

There are two problems with current cylindrical projections for world maps. First, existing map have a static height-to-width aspect ratio and do not automatically adjust their in order to optimally use available canvas space. Second, many of the commonly used compromise show areas shapes at higher latitudes considerable distortion. This article introduces new projection that adjusts distribution parallels canvas. The goal designing this was land masses central visually balanced appearance...

Abstract Longitude–latitude grids are commonly used for surface analyses and data storage in GIS. For volumetric analyses, three‐dimensional meshes perpendicularly raised above or below the gridded applied. Since defined with geographic coordinates, they not equal area volume due to convergence of meridians radii. This article compiles presents known geodetic considerations relevant formulae needed longitude–latitude grid mesh The effect neglecting these is demonstrated on calculations...

This article introduces interactive video maps for the web. The main component of is a stream that areally georeferenced to spatial reference system in same way rectified raster orthoimages are georeferenced. areal georeference allows interactivity goes beyond play, pause, and stop functionality player software. We highlight two types functionality, allowing user (1) combine layer with other vector map layers (2) adjust projection real time. exemplify by A Year Life Earth's CO2, an...

The Patterson cylindrical, a new projection designed for general-purpose mapmaking, is an alternative to other cylindrical projections. It positioned between the Plate Carrée projection, which has 1:2 aspect ratio, and Miller 1 excessively exaggerates size of polar areas. balances exaggeration against maintaining familiar shape continents compact height-to-width ratio. Creating started with graphical template made in Flex Projector that served as guide developing polynomial equations, are...

The adaptive composite map projection technique changes the to minimize distortion for geographic area shown on a map. This article improves transition between Lambert azimuthal and transverse equal-area cylindrical that are used by projections portrait-format maps. Originally, Albers conic was suggested transforming these two projections, resulting in graticules not symmetric relative central meridian. We propose alternative Wagner transformation provide equations parameters transition....

The Natural Earth II projection is a new compromise pseudocylindrical for world maps. has unique shape compared to most other projections. At high latitudes, meridians bend steeply toward short pole lines resulting in map with highly rounded corners that resembles an elongated globe. Its distortion properties are similar established Equations consist of simple polynomials. A user study evaluated whether map-readers prefer 355 participating general rated the lower than Robinson and...

In 1989, Herbert Hufnagel introduced a mathematical model for family of equal-area, pseudocylindric projections, which includes the Mollweide, Wagner IV, and Eckert IV projections as specializations. Hufnagel’s contribution has received very little attention, his are not available in any commonly used cartographic software packages. This article makes three contributions: The is to English-speaking community; algorithms computing forward reverse presented; eight new proposed by analyzed.

Abstract. The Equal Earth map projection (Figure 1) is a new pseudocylindrical for world maps. It similar to the popular Robinson projection, but unlike Robinson, it an equal-area projection. shows continental outlines in visually pleasing and balanced way. Its equations are simple implement fast evaluate. creation of this was motivated by wave news stories about Boston Public Schools switching maps using Peters Since its online publication August 2018, has already been adopted various...