terrain tiles
See Also: average point spacing
[3D GIS] A spatially coherent organization of terrain data facilitating efficient retrieval and editing. Tile definition is based on the average point spacing of the source data.
tileset - Produces tilings of the source projection for use in the destination region and projection.
KEYWORDS
raster, tiling
SYNOPSIS
r.tileset
r.tileset help
r.
tiles : Rectangular areas of defined size in a raster object used for storage of the information. Storing raster objects in tiled format generally increases display speed when viewing less than the entire object ...
1) The tiles are all the same size, 1201 by 1201 elevation postings. No need for embedded record length data. 2) The tiles are all oriented north/south. No need for embedded rotation angle information. 3) All data is referenced to the WGS84 EGM96 ...
terrain tiles
A spatially coherent organization of terrain data facilitating efficient retrieval and editing. Tile definition is based on the average point spacing of the source data.
tessellation ...
For most tiles, the number of data points exceeded 500 and approximate versions of the thin plate spline procedures were used. These depend on choosing a set of "knots" which equi-sample the three dimensional independent variable space.
Replacing tiles is considerably simpler than onboard compilation or employing a look-aside store. However, it may not be efficient for transmission.
Make sets of tiles which exhibit various kinds of symmetry and which tile the plane in various symmetrical patterns.
TABLE 1 Percentiles of DOP, July 20, 2007, 5[degrees] cutoff Percentile HDOP VDOP 90th 1.15 1.77 95th 1.24 1.92 99th 1.44 2.36 99.9th 1.77 2.83 ...
During this period, the first reptiles and winged insects appear. Perched Water Table Water table that is positioned above the normal water table for an area because of the presence of a impermeable rock layer.
Import a subset of tiles from the larger cache
Export a subset of tiles from a larger cache
Import or export an entire cache ...
Tiles subdivide the area covered by a map library and organize the library data by location (e.g., counties might be the tiles in a statewide database).
I took a couple of large Landsat tiles (~200 Mb each) and ran them through a process of transforming them from their UTM projection to my local Netherlands RD.
The flight made it through with flying colors except for a possible scare when it was noticed that several heat shield tiles had come loose from the tail.
When you create a map, you will only need to load the tiles that are defined for you specific geographic region. When you pan or zoom to a different region, Google Maps will only request the tile images that are required to produce your map.
The observations are then divided into the selected number of classes, each class containing the same number of observations. The term quartiles is used when the data are divided into four classes, quintiles for five, and sextiles for six, and so on.
In the file based models due to the performance limitations the entire workspace is divided into tiles.
This dataset comprises 100 tiles (one degree by one degree each) at 30 arc-second resolution. Therefore, each tile is 121 rows by 121 columns--small enough to practice with, yet so small that many tiles are needed to produce interesting DEMs.
This is commonly used when the data source is the USGS series of DEMs. Because DEMs are created and distributed as tiles, if your study area falls across several tiles, it is often necessary to merge these tiles together.
Chrisman, N.R., 1990. "Deficiencies of sheets and tiles: building sheetless databases," International Journal of Geographical Information Systems 4:157-67. A more general discussion of building edgematched databases.
Short-period comets exist with apoapses closer than this, however, and old comets that have had most of their volatiles driven out by solar warming are often categorized as asteroids.
Raster - "1. An element of a space that has been subdivided into regular tiles by tessellation. 2. Commonly, a data set, as for an image or DEM, composed of rasters. 3. Often used as a synonym for grid" (Bonham-Carter, 1994, p. 373).
Tiles are an effective way of dividing a continuous map into units which can be easily created, edited, and analyzed. The terms tile and facet are synonymous and are, in some ways, the opposite of a continuous map.
These separate subfiles are referred to as tiles or facets. A continuous map allows the user to move in any and all directions without moving from file to file.
tiled datasets GIS datasets that are broken up into geographic regions or tiles for ease and speed of processing and use.
topological accuracy The correct pattern of relationships among map features.
If the polyhedral faces cover (i.e. tile or tessellate) the plane when juxtaposed, the map can be useful even in its unfolded form. Any triangle or quadrilateral tiles the plane, like a regular hexagon does, but the regular pentagon does not.
Tile A part of the database in a GIS representing a discrete part of the earths surface. By splitting a study area into tiles, considerable savings in access times and improvements in system performance can be achieved.
Gastroliths -- Fossilized gizzard stones, usually only applicable in the fossil study of reptiles ...
(the USGS quads use a LAT/LONG and alpha-numeric numbering scheme).
Reselect the quad polygon from the index24 coverage (based on NAD27 tiles!)
Clip the DRG with the quad
Rename the quad to the WMD standard Creating a Seamless DRG Layer ...
A Tutorial on Handling Coordinate Systems in ArcMap. Getting these images from terraserver required that we download several individual tiles with their world files then used the ArcGIS mosaic function to merge them into one image.
The encoding of topological relationships in such a manner that those relations are maintained even when a data layer has been physically partitioned into multiple tiles. (Compare with Seamless Database)
Currency ...
Seamless geographic database - The method of organizing geographic data in such a way that the data physically stored as individual files, known as tiles, can be retrieved as if they were in one single file or database.
...
The concept comprised attractively detailed wood-glass boxes under a light membrane roof made of bright textiles.
In the central and driest part of the desert there are around 70 different animal species, 20 of which are large mammals like the spotted hyena. Other mammals include the gerbil, sand fox and Cape hare. Reptiles like the sand viper and the monitor ...
an area of abnormally low yield as linked with a section of old drainage tile in need of repair. Further analysis might locate areas in which simulated yield increases under drier conditions justify the installation of additional drainage tiles.
By splitting a study area into tiles, considerable savings in access times and improvements in system performance can be achieved.
 See also: Information, Feature, Map, Area, Image
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