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c.4| STEREORESTITUTION

c.4| STEREORESTITUTION

The digital photogrammetric imaging is performed by internal orientation, relative orientation using automatic and semi-automatic methods of correlation and determination of absolute orientation in space of each frames. Following these steps to create stereoscopic models (pairs of oriented frames) which can thus be operated independently. Given the necessary high points in the absolute orientation, large photogrammetric projects should be an in...

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c.5| LiDAR (Light Detection And Ranging)

c.5|  LiDAR (Light Detection And Ranging)

Scanning laser aerial LiDAR technology/method of detecting distant objects and determining their position by analyzing the reflected laser impulse of their areas using airborne laser sensor. LiDAR technology is used for flood risk studies, forest inventory (tree height, vegetation density), transport, 3D modeling of buildings, land management and others. Main products are obtained by LiDAR technology DEM (Digital Elevation Model) and contour li...

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c.6| DTM (Digital Terrain Model) & DSM (Digital Surface Model)

c.6| DTM (Digital Terrain Model) & DSM (Digital Surface Model)

DTM - is a topographical model of the Earth that is processed by specific software, it has digital terrain elevation. It is represented on a scale between 1:50 and 1:500. Basics for DTM's are break lines representing edges of objects, sides of buildings, all the small changes in height of the relief. DSM - is crude photogrammetry, 3D representation of the terrain that includes elements such as buildings, vegetation, high voltage lines and t...

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c.7| ORTHOPHOTOGRAPHY

c.7| ORTHOPHOTOGRAPHY

Orthophotomap is an aerial image that has corrected the errors due to the tilt plane on take-over, errors due to uneven stair frames and differences in level of relief. Orthophotomap stand at the basis of a series of processes such as aerotriangulation, digital terrain model (DTM), ortho correction and mosaic. Ortho-rectification is a process that provides a more accurate picture by removing a perspective because in aerial images that are sh...

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c.8| TEHNICAL FEATURES

c.8| TEHNICAL FEATURES

Photogrammetric scanner GEOSYSTEM DELTA R6 Features: CCD pixel size; 8µm; Geometric resolution; 1µm; Geometric accuracy(RMS) ±2µm; Optimal maximum density; 3.4D; Maximum scanned size 320x320mm or 320x450mm; The maximum diameter of the roll 168mm. Scanner A0 CONTEX CHAMELEON 36” Features: Color monocrom/PLUS; 4 channels RGB and B&W with 14-bits graytone; Resolution: 800dpi. ...

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d.1| GIS (Geographic Information System)

d.1| GIS (Geographic Information System)

GIS (Geographic Information System) — is a computer system used for collecting, storing, checking, integrating, manipulating, analyzing and visualizing geographic data and geospatial. GIS consists of: Digital data — Geospatial information that you will show you and will be analyzed using computers and programs; Computers — computers and/or servers used to store, display and processing data; Software — running on comp...

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d.2| THEMATIC MAPS

d.2| THEMATIC MAPS

Spatial analysis includes techniques which studies the relationships between entities, in terms of topological geometry or geography. The emergence of a potential disaster depends on two factors: hazard and vulnerability. Hazard is the likelihood of a potential devastating phenomenon and that vulnerability is the degree of destruction resulting from the occurrence of the phenomenon. Risk analysis should be part of any project or risk man...

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d.3| DIGITAL CARTHOGRAPHY

d.3| DIGITAL CARTHOGRAPHY

Cartography, is in charge of drafting, editing and drawing maps. Paper maps provide basic information of reality, but they lack specific details that help us better understand landscape. Updating information on printed map is very cumbersome, and printing a new edition/version happens more often at distances of time, so that in very few cases we have accurate information in real time. Digital Cartography, is the process by which a da...

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d.4| WebGIS

d.4|  WebGIS

Web Mapping is the process of generation and distribution maps using the WWW and its characteristics. While Web Mapping addresses to the technological problems, Web Cartography its studying theoretical aspects: the use of web maps as services, evaluation and optimization techniques and workflows, utility maps, social issues and more. WebGIS is similar with Web Mapping, further emphasis on the analysis and processing of geographic data. (sourc...

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d.5| SPATIAL DATABASE

d.5| SPATIAL DATABASE

Spatial database is a database that has the additional textual ability to store and query data representing objects defined in a geometric space. Most databases allow representing objects by points, lines, polygons or more complex structures: 3D objects, topology, linear networks, etc. The main RDBMS used in GIS are: Microsoft SQL Server - the way how POLYGONS geometry it's stored ((x1 y1, x2 y2, x3 y3, x4 y4, x5 y5)) eg. DECLA...

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