UniStrong

DRG Digital Raster Graphic

Digital Raster Graphic (DRG) is a digitized product of paper topographic maps. After scanning, rectification, map sheet processing, and data compression, each map produces a raster file that remains consistent with the original topographic map in content, geometric accuracy, and color.

Original UniStrong unit·Authorized distributor

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Dispatch in 3 to 7 working daysShips in 3–7 days · DDP / CIF / FOB
DDP / CIF / FOB to most countries
Local coordinate system preset before shipping

Overview

About the DRG

Specifications

A Digital Raster Graphic (DRG) is a digitized product of a paper topographic map. After scanning, rectification, map sheet processing, and data compression, each sheet forms a raster file that maintains consistency with the original topographic map in content, geometric accuracy, and color.

DRGs can serve as background layers for data reference, revision, and alignment of other geographic information. They are used for data acquisition, evaluation, and updating of Digital Line Graphs (DLGs), and can also be integrated with Digital Orthophoto Maps (DOMs), Digital Elevation Models (DEMs), and other data layers to derive new visual information for extracting and updating map data or compiling paper maps.

Features

● Technical specifications of Digital Raster Graphics (DRGs): Geographic content and visual style remain identical to topographic maps of the corresponding scale; the horizontal reference system is based on the Xi'an 1980 Geodetic Coordinate System; ● Map projection uses the Gauss-Krüger projection; the elevation system adopts the 1985 National Height Datum; ● Image resolution: input greater than 400 dpi; output greater than 250 dpi.

Specifications

Technical data

Values from the UniStrong datasheet. Ask us for the full sheet or a side by side with another model.

Digital Line Graphic (DLG)

Scale: Available in various scales including 1:500, 1:1,000, 1:2,000, 1:5,000, 1:10,000, etc.
Spatial Accuracy: Achieves spatial coordinate data with a horizontal geometric accuracy of 0.05 m
Data Format: DWG, DXF, mdb, Tif, jpg