Base Map layers are designed to contain pre-authored content, such as rasters or imagery. As a trade off for enhanced drawing and rendering performance, most geoprocessing tools cannot be used on Base Map layers.
The DeLorme World Base Map is seamless and horizontally accurate, with a consistent level of detail and a topographic view of the Earth. It has been used extensively in U.S.
Base Map
The base map is the most accurate spatial database within a data system. Base maps tend to be streets, parcels and other fundamental layers.
Base Map: The term 'base map' is used, throughout this site, to signify those GIS cartographies which chart a writer's movement through place over time.
Base Map: Map on which information would be placed for purposes of comparison. It may be used to construct other maps by the addition of information. Base maps usually contain mapped data that seldom changes and is used repeatedly.
Base Map - A map on which information can be placed for geographical correlation. Also can be used as a "base" upon which to build other information.
Base Map - A map showing planimetric, topographic, geological, political, and/or cadastral information that may appear in many different types of maps. The base map information is drawn with other types of changing thematic information.
Base Map: A term which varies in different applications, but, in general, refers to a map that depicts the fundamental map elements, such as streets, buildings, streams, etc., which are used frequently for locational reference.
Base Maps provide the background upon which thematic data is overlayed and analyzed.
Base Maps depict fundamental information about the Earth's surface such as landforms and drainage. They also symbolize landmark features like roads, railways, populated places and buildings.
base map - A map containing geographic features, used typically for locational reference and for overlaying specific, discipline data.
base map : A map containing visible surface features and boundaries, essential for locating additional layers, or types, of georeferenced information
Buffering: The process of creating areas of calculated distance from a feature ...
Base Map: A map containing the background upon which geographic data is overlayed and analyzed. Basic representation of a region of the earth as it would appear if viewed from above.
Base Maps
The spatial models are developed from geographic information. We used a popular desktop GIS (geographic information system) to house the spatial database. We geocoded each customer's address and the location of our store.
Base Map
A map which displays planimetric and /or topographic information and which may be used as a base for a thematic layer. Features which may be included on a base map are: roads, rivers, major structures (buildings), contours, etc.
BASE MAP
A map containing geographic features used for locational reference. Roads, for example, are commonly found on base maps.
BINARY
A base 2 number that uses only the data values of 0 or 1. It is the fundamental basis of all digital computing.
Base map - In a GIS or digital mapping system, base map refers to those layers of map information (e.g. topography, roads, rivers and lakes) used for georeferencing layers of thematic information (e.g.
Base Map
A map designed specifically to be used as a template, onto which further information is placed for the purpose of comparison or spatial correlation.
Base map printed in a dark colour (usually black or sepia)
The addition of colour by hand painting (it is interesting to note that, in haste, the artist painted the land as well as water areas around Adelaide.
base map data (streets, etc.)
base flood elevation lines and elevations
cross sections and letter identifiers
elevation reference marks and their elevations
floodways if not shown on the FIRM ...
Base Maps--Include streets and highways; boundaries for census, postal, and political areas; rivers and lakes; parks and landmarks; place names; and USGS raster maps.
base maps showing reporting zones
atlases produced for urban areas
digital products - boundary files, TIGER
E. TIGER ...
The base map includes administrative boundaries, cities, water features, physiographic features, parks, landmarks, highways, roads, railways, airports, and buildings overlaid on land cover and shaded relief imagery for added context.
parcel-base map A map showing land parcels that is used as the fundamental data layer to which other data layers are referenced.
Ontario Base Map; Ontario Basic Mapping Program
OBRP
Object representation ...
Figure 3. Base map produced in ARC/INFO with 1962 aerial photograph showing the study area.
...
The Iqaluit base map is derived from the map files generated to produce the Iqaluit commemorative map. The commemorative map served as the starting point to craft the base map used for several applications on this site.
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Important notices ...
Digital photo base maps, scanned paper maps, and other raster maps are very effective base layers for internet map servers or standalone desktop analysis systems.
About Contextual Base Maps
U.S Data available on the GSD LAN
World-Wide Data Sources on the GSD LAN
Exporting Shapefile Data and Layer Information
Choosing a Projection ...
Base Map: A set of topographic data displayed in map form providing a frame of reference or contextual information to the user.
Buffer: A polygon enclosing an area within a specified distance from a point, line or polygon.
The term "base map" was at one time applied to a class of maps now known as outline maps. It may be applied to topographic maps, also termed "mother maps" that are used in the construction of other types of maps by the addition of particular data.
If the user selects the SCREEN option, then points marked on the image will automatically be associated with the coordinates from the corresponding points on the target data base map layer.
base maps, data, or layers Spatial data sets that provide the background upon which more specific thematic data is overlaid and analyzed.
These maps comprise of polygons which are created from the base map, which shows the details of the ownership of the properties and related information.
The largest activity currently under way is the development of base map data, digital orthophotos, and ele vation models for all Energy Systems facilities using advanced stereo photogrammetric techniques based on real-time airborne GPS.
Using a GIS and digital versions of the 1:100,000 - scale transportation network, political boundaries, and hydrographic features, cartographers produced a 1:500,000 - scale standard base map of New Jersey.
Starting with an accurate base map of a London neighborhood which included streets and pump locations, Snow mapped out the incidents of cholera death. The emerging pattern centered around one particular pump on Broad Street.
If an image is not geometrically distorted in any way (not rotated, not skewed, not in a mountain area, etc) as compared to the base map, than a one step geo-referencing may work.
Bentley CADscript was used extensively in the production of the base map for ordering various layers of information.
When done, we registered the tracings to a base map, on which the Eason Oil lineaments were also plotted, as seen below. The comparison disclosed rather startling discrepancies in terms of variance between the two groups.
For all original data capture, involving line or polygon features being georeferenced to either the TRIM or Provincial 1:250,000 topographic base maps, compile using UTM to maintain consistency with Provincial topographic base mapping standards, ...
The DRGs now serve a major role as a complete base map for use within the SJRWMD's GIS.
Thanks to Brian May of the SJRWD for this contribution.
The map compilation procedure consists of the accurate transfer of map unit boundaries, symbols, drainage, and cultural features from the field sheets to orthophoto base map overlays.
geodetic control, locational accuracy, base map
coordinate-reference system
mapping scale, resolution
data content, completeness
classification system, coding methodologies
digitizing-automation techniques (image ...
1. Digital Line Graph files from the U.S. Geological Survey (USGS), including data from the base map categories such as transportation, hydrography, contours, and public land survey boundaries.
They are often employed as "base maps" upon which thematic data are portrayed.
Figure 3a. Digital revision of 1:100,000-scale digital line graph data to produce a 1:500,000-scale New Jersey State base map. Paneling and generalization are shown in three stages from 1:100,000 scale to 1:250,000 scale to 1:500,000 scale.
The usefulness also depends upon the contents of a map. The contents can be seen as primary content (main theme), secondary content (base map information) and supportive content (legends, scale, etc).
What is the scale of the map?
[ESRI software] A Web-based system for sharing, finding, and using maps, layers, and services. ArcGIS Online includes a set of base maps, map layers, and tools published by ESRI for use inside ArcGIS products.
The second option allows you to load a pre-existing template that can be used to achieve certain layouts and base maps. The third option allows you to open up an existing map document, which was saved prior to opening ArcMap.
Components would include e-mail, access to data archives, presentation of parallel texts and counter texts in diverse media, real-time data analysis, standard base maps and data sets, sketch map and field note capabilities (Schroeder, 1995).
also includes descri ptions of several types of projections for use when mapping various areas, such as the Mollweide, Hammer, Bonne, Alber's equal area, Lambert's conformal conic and more. The second half of the chapter is devoted to base map ...
 See also: Information, Map, GIS, Mapping, Geographic
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