Earth 3d Maps [TOP] Download

Natural Earth is a public domain map dataset available at 1:10m, 1:50m, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.

Natural Earth solves a problem: finding suitable data for making small-scale maps. In a time when the web is awash in geospatial data, cartographers are forced to waste time sifting through confusing tangles of poorly attributed data to make clean, legible maps. Because your time is valuable, Natural Earth data comes ready-to-use.

Earth 3d Maps Download

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Chlorophyll is used by algae and other phytoplankton--the grass of the sea--to convert sunlight and carbon dioxide into sugars. These maps show chlorophyll concentrations in the ocean, revealing where phytoplankton are thriving.

These maps depict how much hotter or cooler an ocean basin was compared to the long-term average. Temperature anomalies can indicate changes in ocean circulation or the arrival of patterns like El Nio and La Nia.

Airborne aerosols can cause or prevent cloud formation and harm human health. These maps depict aerosol concentrations in the air based on how the tiny particles reflect or absorb visible and infrared light.

Some elements of this visualization are not adjusted for time (eg. cloud and star positions). The locations are accurate to ~100 km. The coloring of the maps is based on elevation and bathymetry: dark blue = deep water, light blue = shallow water; dark green, green, tan, brown, white = ground in increasing order of elevation.

The library provides maps, GIS and data visualization support and geospatial data. Our Map Collection librarians serve the needs of both sciences and humanities with a collection of over 200,000 maps as well as atlases, geographic reference books, and Colorado historical aerial photographs.

When I had an XP computer, I use to be able to download Google earth direction onto my computer, then it was easy to overlay the light pollution map over google earth. The light pollution map worked from the clear sky clock link.

Google earth is still free, but you need internet to use the maps dynamically. If it's one particular spot you are interested in you should be able to zoom in on it while online, then refer to it later when you are off line as it caches the map data.

I go a bit farther, and set up a window running google maps, and resize the two window displays to match, and then 'fast switch' using Alt-Tab, but that is really only necessary so I can see small scale roads and check satellite view to see if a road is real or a google fantasy (well, jeep trail, although in Wyoming I saw several numbered roads disappear into muddy fields).

The Earth Sciences & Map Library also offers large format scanning services for cartographic materials. Our sheet-feed scanner is capable of scanning maps with a maximum dimension of 52 inches. We are not able to scan bound items. For oversize or bound materials, please contact Duplication Services. Maps are scanned at 400dpi (600dpi available upon request) and delivered via the web as high quality JPEG or TIFF files. Please see this library guide regarding large format scanning for more information.

The collection covers physical geography and the geosciences including structural geology, tectonics, oceanography, seismology, geochemistry, glaciology, geophysics, atmospheric science, planetary science, geomorphology, climatology, and cartography. It includes over 140,000 volumes, thousands of e-books, more than 1,500 print and electronic journals, and over 470,000 maps and air photos issued by local, state, and federal agencies, foreign governments, international organizations, and commercial firms.

The NFHL is made from effective flood maps and Letters of Map Change (LOMC) delivered to communities. NFHL digital data covers over 90 percent of the U.S. population. New and revised data is being added continuously. If you need information for areas not covered by the NFHL data, there may be other FEMA products which provide coverage for those areas.

I love maps. Sometimes I'll just scroll around Google maps imagining myself traveling around different areas. Whenever I end up going to these places, I always feel a small connection to them. Are there any maps that show the distance between Hobbiton and Mordor, etc. Silmarillion maps are also appreciated.

Other issues are tiles not being aligned 1:1 and these are primarily due to the method I use for crushing stupidly high vertex models (8 mil tris) down to something actually usable, like 50k. While this method does try it's best to preserve areas with extremely high elevation changes like mountainous regions, the UV maps that are produced by this are iffy. This causes squiggly terrain which is luckily only seen occasionally on roads and airstrips, so uhh.. don't look too hard and remember the fact that this is a 10 year old game.

Map projections can be constructed to preserve some of these properties at the expense of others. Because the Earth's curved surface is not isometric to a plane, preservation of shapes inevitably requires a variable scale and, consequently, non-proportional presentation of areas. Similarly, an area-preserving projection can not be conformal, resulting in shapes and bearings distorted in most places of the map. Each projection preserves, compromises, or approximates basic metric properties in different ways. The purpose of the map determines which projection should form the base for the map. Because maps have many different purposes, a diversity of projections have been created to suit those purposes.

Another consideration in the configuration of a projection is its compatibility with data sets to be used on the map. Data sets are geographic information; their collection depends on the chosen datum (model) of the Earth. Different datums assign slightly different coordinates to the same location, so in large scale maps, such as those from national mapping systems, it is important to match the datum to the projection. The slight differences in coordinate assignation between different datums is not a concern for world maps or those of large regions, where such differences are reduced to imperceptibility.

Projection construction is also affected by how the shape of the Earth or planetary body is approximated. In the following section on projection categories, the earth is taken as a sphere in order to simplify the discussion. However, the Earth's actual shape is closer to an oblate ellipsoid. Whether spherical or ellipsoidal, the principles discussed hold without loss of generality.

Selecting a model for a shape of the Earth involves choosing between the advantages and disadvantages of a sphere versus an ellipsoid. Spherical models are useful for small-scale maps such as world atlases and globes, since the error at that scale is not usually noticeable or important enough to justify using the more complicated ellipsoid. The ellipsoidal model is commonly used to construct topographic maps and for other large- and medium-scale maps that need to accurately depict the land surface. Auxiliary latitudes are often employed in projecting the ellipsoid.

A third model is the geoid, a more complex and accurate representation of Earth's shape coincident with what mean sea level would be if there were no winds, tides, or land. Compared to the best fitting ellipsoid, a geoidal model would change the characterization of important properties such as distance, conformality and equivalence. Therefore, in geoidal projections that preserve such properties, the mapped graticule would deviate from a mapped ellipsoid's graticule. Normally the geoid is not used as an Earth model for projections, however, because Earth's shape is very regular, with the undulation of the geoid amounting to less than 100 m from the ellipsoidal model out of the 6.3 million m Earth radius. For irregular planetary bodies such as asteroids, however, sometimes models analogous to the geoid are used to project maps from.[24][25][26][27][28]

Lee's objection refers to the way the terms cylindrical, conic, and planar (azimuthal) have been abstracted in the field of map projections. If maps were projected as in light shining through a globe onto a developable surface, then the spacing of parallels would follow a very limited set of possibilities. Such a cylindrical projection (for example) is one which:

Equal-area maps preserve area measure, generally distorting shapes in order to do so. Equal-area maps are also called equivalent or authalic. These are some projections that preserve area:

The mathematics of projection do not permit any particular map projection to be best for everything.[39] Something will always be distorted. Thus, many projections exist to serve the many uses of maps and their vast range of scales.

Modern national mapping systems typically employ a transverse Mercator or close variant for large-scale maps in order to preserve conformality and low variation in scale over small areas. For smaller-scale maps, such as those spanning continents or the entire world, many projections are in common use according to their fitness for the purpose, such as Winkel tripel, Robinson and Mollweide.[40] Reference maps of the world often appear on compromise projections. Due to distortions inherent in any map of the world, the choice of projection becomes largely one of aesthetics.

Thematic maps normally require an equal area projection so that phenomena per unit area are shown in correct proportion.[41]However, representing area ratios correctly necessarily distorts shapes more than many maps that are not equal-area.

Google Earth is a popular Internet application through which users can view maps. This web site provides zipped Keyhole Markup Language (.kmz) files through which users can view map overlays created from FEMA's National Flood Hazard Layer on Google Earth images.

The name of each layer is hyperlinked to a description of the layer, the map symbols used for the layer, and links to other FEMA web sites relevant to the layer. If a layer is turned on, clicking the text below the name of the layer (text that starts with "Draws at") zooms the Google Earth view to a sample display of the layer. Layers are organized for display at one or more of three "eye altitude" (map scale) ranges in Google Earth: status maps at high altitudes, regional overviews of flood hazards at medium altitudes, and detailed flood hazard maps at low altitudes. Click on the hyperlinked folder name of the application to see the altitudes at which data in the layers are displayed. ff782bc1db