This map is useful for heliospheric studies since radial structure e. Small scale global, continental maps a small scale map covers a large area. The hammeraitoff map projection is an equalarea map projection which displays the world on an ellipse. Supported linear units, map projections, and projected coordinate systems map projection parameters name sphereonly parameters key below aitoff yes lam0 albers equal area conic lam0 phi1 phi2 phi0 azimuthal equidistant lam0 phi0 behrmann yes lam0 bonne lam0 phi1 cassini lam0 phi0 k0 craster parabolic yes lam0 cube yes lam0 option. Aitoff hammer map projection, distortions, sky map abstract aitoff hammer is an equalarea map projection generally used for representing the world map. Aitoff projection definition is an equalarea projection similar in appearance to the mollweide projection but with curved parallels.
Miller projection medium detail political physical. Of the other tools available to you, neither basemap nor cartopy support the aitoff projection. Because the hammeraitoff projection produces an equal area map of the entire globe, it is useful for visual representations of geographically related statistical data and distributions. This is a summary of map projections that have articles of their own on wikipedia or that are otherwise notable. This map projection is an equalarea map projection which displays the world on an ellipse. Hammer projection hammer aitoff is an equalarea map projection stretched into a 2. The following table lists a representative sample of the map projections supported by the ibm informix spatial data types. The border is an ellipse, equator and central meridian are straight. This projection was created by david aitoff in 1889. Aitoff projection depicted for the earth in the image.
Map projections ibm informix spatial data types support many map projections. The border is an ellipse, equator and central meridian are straight lines, while other parallels and. Free world aitoff projection map aitoff projection world. Inspired by aitoff projection, it is also known as the hammeraitoff. Layered ai for illustrator and editable layered pdf. Supported linear units, map projections, and projected. The aitoff projection in matplotlib cannot have its limits changed they are fixed to a global extent i think it is because it simplifies axis creation. Aitoffhelp arcgis for desktop arcgis desktop arcgis online. The central meridian is a straight line half as long as the equator. The aitoff projection is a modified azimuthal map projection proposed by david a.
Based on the equatorial form of the azimuthal equidistant projection, aitoff first halves longitudes, then projects according to the azimuthal equidistant, and then stretches the result horizontally into a 2. Because there is no limit to the number of possible map projections, there can be no comprehensive list. The hammeraitoff projection this map projection is an equalarea map projection which displays the world on an ellipse. Illustration about aitoff projection of world map vectorial format file. Aitoff vandergrinten 65 except where otherwise noted, images on this site are by tobias jung and are licensed under cc bysa 4.
You may do so in any reasonable manner, but not in. The aitoff projection is a modified azimuthal map projection. It is a modification of the lambert azimuthal equal area projection. The aitoff projection inspired the similar hammer projection, which is equal area. The pixels in some projections have equal areas solid angles, which. In this article, we present its application to a celestial hemispheres map. Maptorian is an awesome map collection designed to easily create your own map projects for personal or commercial use without any restriction. A sky map in the aitoff hammer projection loredana stoica, doina vasilcaromania keywords. In the conventional case, the parallels are curved, and there is no stretching at the center of the map.
Because the hammer aitoff projection produces an equal area map of the entire globe, it is useful for visual representations of geographically related statistical data and distributions. Hammeraitoff hotine oblique mercator igac plano cartesiano krovak laborde oblique mercator lambert azimuthal equalarea lambert conformal conic. It in turn inspired the briesemeister, a modified oblique hammer projection. Modifies the hammer projection by adding a pole line. Although the earth is best represented by a spheroid. World globe in hammeraitoff projection powerpoint template. Directly inspired by the aitoff projection, hammer suggested the use of the equatorial form.
Hammer aitoff map the hammer aitoff map is an equal area projection of the sky. All structured data from the file and property namespaces is available under the creative commons cc0 license. Since such a map will cover a large area we want a projected coordinate system that will show the entire world in an attractive way, but also minimizes distortion from the projection process. The scale of the projection always changes as you move around. The hammeraitoff projection is a modification of the lambert azimuthal equal area projection. The border is an ellipse, equator and central meridian are straight lines, while other parallels and meridians are complex curves.
This map was created from a hemisphere of the equatorial case of lamberts azimuthal equalarea projection using a trick similar to the method by which the miller cylindrical projection was made from the mercator projection. Actual size of the projection minus the black or white background. Maptorian is a vector map collection created thinking about the work of graphic designers, journalists, students and people who need to create visually appealing maps easily and quickly. The original equalarea version of the adaptive composite map projection technique uses the lambert azimuthal projection for regional maps and three alternative projections for world maps.
However, to maintain accuracy for largerscale maps scales of 1. Aug 11, 2011 the hammeraitoff map projection is an equalarea map projection which displays the world on an ellipse. Aitoff projection definition of aitoff projection by. Aitoff the aitoff projection looks similar, but is not equal. It is a modification of the equidistant azimuthal projection. Files are available under licenses specified on their description page. Also called the elliptical or homolographic equalarea projection. This file is licensed under the creative commons attributionshare alike 3. Hammer aitoff projection produces an equal area map of the entire globe, it is useful for visual representations of geographically related statistical data and distributions. Note that example 4 shows a rather sophisticated use for. Very close to equalarea, in fact areal distortions are only to be found close to the poles. Geological surveys general cartographic transformation package gctp. Scale is the conversion from angle to linear distance on the map inches per mile on an earth map.
However, it is completely unlike the mollweide projection. Astronomers use this projection to show the entire celestial sphere on one map in a way that accurately depicts the relative distribution of the stars in different regions. Hammeraitoff projection produces an equal area map of the entire globe, it is useful for visual representations of geographically related statistical data and distributions. Understanding map projections landing page for kartoweb. However, in the hammeraitoff projection, the parallels are curved lines. The hammeraitoff projection is a modification of the lambert.
The aitoff projection is a modified azimuthal world map projection created by david a. The hammer projection is an equalarea map projection described by ernst hammer in 1892. Learn more about the lambert azimuthal equal area projection. Between those scales, choosing to use a sphere or spheroid will depend on the maps purpose and the accuracy of the data. Parallels are straight and parallel in this projection. Aitoffvandergrinten 65 except where otherwise noted, images on this site are by tobias jung and are licensed under cc bysa 4. A geographic coordinate systems pdf file which contains lists of supported gcs and vcs.