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Geographic information systems or GIS conversion

What is GIS Conversion ?

GIS is a rapidly growing technological field that incorporates graphical features with tabular data in order to assess real-world problems. This amazing technology was developed in 1960, with the discovery that maps could be programmed using simple codes and then stored in a computer, allowing for future modification whenever required. Geographic Information Systems were a welcomed change from when maps had to be painstakingly created by hand; even small changes required the creation of a new map. The capabilities of GIS are a far cry from the simple beginnings of computer cartography. At the simplest level, GIS can be thought of as an electronic map. However, the storage of data in an easily accessible digital format enables complex analysis and modeling that was not previously possible.

GIS can be thought of as a high-tech equivalent of a map. The reach of Geographic Information Systems expands into all disciplines and has been used to tackle problems ranging from prioritizing sensitive species habitats to determining optimal real estate locations for new businesses.

DesignPresentation creates different layers to acquire a better understanding of a particular geography. We can create layers according to your guidelines. GIS can be used for Urban Infrastructure Planning, Water Resource Mapping and Monitoring, Civil Engineering Mapping, Contour Mapping and Detailed Forest Mapping.

Some GIS Services :

  • Aerial triangulation/Stereo Orientation
  • ArcExplorer and ArcView Training
  • Custom Mapping
  • Parcel Mapping
  • Feature Extraction
  • GIS Mapping related to local area planning
  • Local Area Planning (District Planning Maps, Census Maps, etc.)
  • Civil Engineering Mapping
  • Contour Mapping
  • Detailed Forest Mapping
  • Flood Interpretation
  • Urban Infrastructure Planning
  • DTM generation
  • ArcView Applications Development
  • Contour Mapping (Digital Elevation Models (DEM)
  • Data Automation and Integration
  • Geo-coding of databases
  • Land use mapping
  • Photogrammetry
  • Spatial Analysis and Modeling
  • Utility Mapping
  • Geo Engineering Survey
  • Geological Mapping
  • Irrigation Management, etc.
  • Water Resource Mapping and Monitoring

CAD & GIS Compliment to each other :

In the absence of a single, merged CAD/GIS hybrid application used by all land development professionals, engineering managers for the foreseeable future will face a mixed environment with multiple CAD and GIS applications that need to share geospatial and tabular data. Consequently, the important question today is which organizing framework provides the best platform for interoperability. In this role, GIS has a number of key advantages compared with CAD and is emerging as an integrated alternative for engineering design and modeling.

Many perceive GIS and CAD to be competing technologies because of a superficial similarity in their respective displays on a computer monitor. Indeed, some functional overlap exists, particularly in the areas of computer graphics and spatial data entry. Clearly, the two systems need to work together, and information needs to pass back and forth between them. A GIS frequently uses data encoded into CAD drawings as a source of information describing facilities. Likewise, GIS can provide spatial and geographic context to a CAD drawing.

Historically, GIS has been synonymous with decision support, reliable large-scale spatial data management, data integration, and results-oriented tools for mapping and geographic analysis. Likewise, CAD has been associated with automated production drafting and technical drawings. The CAD data model stores geographic data in binary file formats with representations for many varied forms of geometry. Entity attribute information is represented using various, loosely-linked encoding strategies in CAD files.

GIS is database-centric and, thus, handles data in a single seamless spatial database. Because GIS always has held the possibility of managing data over a wide geographic extent, it includes many tools for map projections and for handling large data volumes. GIS uses the concept of layering for segregating different kinds of information into more easily managed units. In GIS, layers are used to organize geographic themes, including the graphic definition of features, topology defining the spatial relationships between features, attributes defining the characteristics of the features, and business rules.

GIS technology offers the full complement of geographic functional elements — data input, storage, management, retrieval, manipulation, analysis and modeling, output, and display.

Additionally, the speed of GIS for accessing data and generating maps is significant.

GIS technology offers data analysis capabilities and a range of functionality that clearly distinguishes it from the drawings produced by a CAD system.

A closer look at CAD CAD drawings are organized by layers, color or line style, or combinations there of, which are established by the drawing author. CAD graphic primitives each store their own attributes (color, line type, and feature type) or inherit them from the default symbology of the CAD layer on which they were created. Varying symbology is a simple way to organize data, but requires careful quality control to ensure consistency. CAD is characterized by effective tools for the manipulation of autonomous geometric objects, not data management. These tools enable users to create, manipulate, and modify geometric objects, without regard for one feature or another.

Because engineering modelers, planners, CAD designers, and their clients require an uninterrupted flow of information, they need usable data structures, quality data creation, and maintenance tools, whether for surveying, mapping, or engineering modeling. And, these tools must be integrated fully with database and analysis capabilities. They also need full workflow and lifecycle integration so they can pass digital geographic and design data between project team members, as well as to downstream users such as operations and facility managers, field technicians, consultants, and, in some cases, the general public.

Because CAD comes from a world where the communication of the designer's intent for a given project is most important, the concepts of global coordinate systems and integrating data in a mapping context is not well developed, nor is it generally required. Although data may be surveyed to 0.001 inch, potentially significant accuracy can be lost by simply recording the coordinates without regard for its relevance in a mapping space.

A closer look at GIS From the onset, GIS has been able to store spatial information efficiently in data constructs that provide both accurate and effective storage of real world features. The data models used by GIS software retain not only the geometry of features, but also the attributes and identity of features as a fundamental part of the data structure.

GIS features are stored as elements in spatial databases. GIS data structures include geometric primitives such as spirals, circular curves, polylines, points, annotation, and polygons to capture and store real world features. GIS data structures also exist to manage the connectivity of linear features into linear or polygon networks. Polygons' boundaries can themselves be made of simple or complex linear features, including circular curves and spirals.

In a modern GIS workflow, data moves from its original sources to government agencies, inspectors, design firms, environmental consulting firms, construction firms, facility managers, and so forth. At each step, the data may be converted from one format to another and often is printed, handed off, and re-used in various data formats, including CAD.

Conclusion New tools, such as those described in “Interoperability tools” (above), overcome the problems associated with simple file conversion or hybrid CAD-GIS applications that lead to a lowest common denominator solution. Instead they allow data to live in its native format and be seen as another, more useful form of data to the CAD or GIS system that needs it.

Whether used in data migration or to support the distribution of maps out to a CAD file format for consultants, professionals can create, view, and use data according to their exacting symbology, schema, and data file format needs. This allows professionals to use the appropriate tool for the job, while enhancing the flow of information across the enterprise.

GIS enables leveraging diverse data sources to create new and unanticipated solutions and to extend your data's value and magnify its benefit to an organization.

Because it is based on robust and wellproven database technologies, GIS is inherently scalable and can deal smoothly with multiple users, versioning, and data security.

Because it includes mature open standards for data sharing and documentation, GIS allows organizations to build and share information more widely than CAD.

Additionally, GIS is the preferred means for dissemination of public geospatial data, which in itself is a compelling advantage for engineering firms. Perhaps most important, GIS data is organized in ways that make it directly and consistently computable. Unlike CAD systems, which leave data structure to the whims of individual users or require social engineering to police layer standards, GIS facilitates the creation of data of known quality. This means that firms can add value by leveraging data from clients, subcontractors, and government sources.

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