Photogrammetry

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INTRODUCTION: 
             GIS Photogrammetry is the process of obtaining required and reliable measurements from the digital photographs. This incurs the utilization of all views of the photograph like horizontal, vertical and side views for processing and analysis. This is a technique of measuring 2D or 3D objects from photographs. These are also called photo-grimes as they are stored usually by digital or CCD cameras or radiation sensors such as scanners.

The important thing to be noticed is that object is measured without even touching it; hence it is often misunderstood with remote sensing, which means aerial photography and satellite imaging. It includes the interpretation of image. Photogrammetry remote sensing truly replicates the imaging an object with measurements from some distance.

Hence photogrammetry can be sub divided into two groups:

One depends on lens- setting.Aerial photogrammetry

Orthoimagery:

Is a technique that combines the characteristics of aerial photographs and its geometric qualities. It also supports the measurements offering real visualization of the location, directions and areas. The use of terrestrial photogrammetry and Orthoimagery in geographic information system (GIS) has simplified the imaging techniques.

Dimension I GIS has been providing a range and variety of photogrammetry mapping services that include ortho photo editing, digital ortho production, ortho photo rectification and ortho photo mapping in India and across the globe. Our photographic laboratory services would support your projects to the fullest and provides you complete photogrammetry services which offers comprehensive solutions to literally all geospatial data required.

Our highly expert and experienced professionals provide large scale and small scale plan metric feature extraction to support photogrammetry. Regardless to the size of your project we offer right and perfect solution to provide you the correct geospatial needs. The color balancing is done in a generalized manner that soothes to the eyes; it changes the overall mixture of colors in the image keeping in mind the ortho photo contrast. Mosaicking of images can be helpful too, as it allows a true definition to the digital images.

Our geo-spatial photogrammetry Imaging techniques offer variety of photogrammetric solutions that include mapping, remote sensing and geo-spatial imagery. These facilitates the enterprises in efficient data capture, accurate referencing of images, easy analysis and measurements of photographs, which is in turn used as the basis for generating further information for decision-making processes. We are the experts in producing mapping services for efficient capturing of data and accurate referencing of digital images.

BEST SOLUTIONS AT COST EFFECTIVE PRICES:

With Dimension I GIS technical assistance and services are affordable, our knowledgeable professionals at work, are always ready to assist and answer your imaging queries, with their customized solutions for on-site and technical problems.

Example:

Two football fields at two elevations will not have the same length on an aerial photo.Similarly, a ground based exposure of two six foot tall people different distances from the exposure will be of different length

A photograph is not a map:

A map cannot be “tilted” as it is in a defined projection.An aerial photo can contain tip, tilt, or crab which can cause distortion in an imageA map contains a finite amount of detail – points, lines, and text.A photo contains an almost infinite amount of detail (to the pixel level)

Typical metric film based aerial camera:

Fiducially marks – artificial marks in sides or corners of negative frame that appear in every exposureFiducially marks are used to measure film shrinkage or expansionFiducially marks are used to define x,y photo coordinate axes

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