GIS Mapping Services

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					?The integration, storage, editing, analysis, sharing, and displaying of geographical
information by merging cartography and database technology is known as GIS
Mapping. In other words, GIS Mapping uses GIS application to develop cartography
maps.
Electronic maps are created using the GIS technology. Here, data related to positions
on the earth's surface are captured, stored, integrated, manipulated, analyzed and
displayed for easy access, and utilization. GIS generated maps find a range of
advantages like
Quick access to Information and statistics
linkage to alpha-numeric databases
access to data retrieval and analysis
Easy comparison of data for different pipelines and topography
Science, technology and aesthetics are combined to generate an efficient GIS map.
Many companies undertake the GIS Mapping service for providing various mapping
services based on aerial photographs, satellite imagery, the paper maps, or surveyed
data and drawings of varying scales and quality provided by the client. Some of the
commonly developed maps are Contour maps, Utility Maps, Spatial Maps, Cadastral
Maps, Atlas Maps, Thematic & Zonal Maps
The major GIS services are rendered to sectors like
Utilities (Telecom, Water Supply and Waste Water, Electricity Power Distribution)
Municipality planning and development
Oil and Gas
Agriculture
Government entities (county, municipality) for Land Property tax
Forestry
Transportation
Environment


GIS Mapping services are rendered by a skill set of geospatial experts, domain experts,
software developers and project managers. They skilfully and carefully attend to
features like land cover information, hydrology, roads, variables like points, lines and
polygons, and their attributes. The scale of the map are taken into prime consideration
as they carry the information content in a map.
The cumbersome task of placing the data on to paper for digitization, the risks
involved in acquiring or capturing precise information, time consumed for digitizing
and preparation of GIS maps, and the expense involved in hiring professionals and
other equipments have compelled the companies to outsource their GIS mapping
projects to companies that specialize in GIS mapping services in quick span of time as
well for relatively less expensive amount. These companies work on implementing
various GIS mapping services, some of the popular mapping services being
Contour Mapping services - control floods and forest fires, real estate planning and
development, Fleet and logistics management, market analysis, navigation and
positioning, etc
Parcel Mapping Services - details of the ownership of properties and related
information, land administration, property registration by urban & rural governing
organizations, municipality planning and Urban development, etc
Utility Mapping Services - recording and maintenance of public utility transmission
lines such as water mains, sewage systems, telephone lines, power lines, gas mains,
etc
Cadastral Mapping Service - detailed property of an area including its precise location,
dimensions, geographical classifications of property, survey district names, each road,
plot, railway lines, water bodies, vegetation, etc
Thematic & Zonal Map - physical, social, political, cultural, economic, sociological,
agricultural, or any other aspects of a city, state, region, nation, or continent.
The GIS industry uses two methods to store data in a GIS for abstraction - raster and
vector.
In Raster Data Type, the digital information is stored in grids. Raster data can be
raster images with each pixel carrying a color value. They may also contain discrete
value (land use), continuous value (temperature) and null value if no data is made
available. Raster data is stored in various formats like TIFF, JPEG or BLOB.
Vector images employ geometric shapes to store the geographic information. Vector
images contain variables like lines/polylines, polygon, and points to represent the
geographic information in the map. These geometric variables are linked in a row in a
database to describe their attributes. Vector data in the form of contour lines and
trianguled irregular networks can be used to represent continuously varying
phenomena like elevation and other constantly changing values.
Aerial photography or satellite images containing the topographic data are checked
for their theoretical dimensions. The data is then printed on a paper or PET film map.
This is then scanned into a raster data in formats like TIFF, and JPEG, which then can
be used to create vector database. The spatially located variables of the vector image
are superimposed onto the raster maps.

				
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