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PRODUCt Sheet

DmC® ii250

Camera sYstem

Large-Format DigitaL Camera inCLuDes Five Camera HeaDs

Intergraph® is a world leader in providing photogrammetric solu-tions that support all your earth imaging requirements, from data acquisition to exploitation and data distribution. Our Digital Mapping Camera (DMC®

) is the industry’s most innovative turnkey large-format digital camera system. We developed the medium-format RMK D so more organizations can take advantage of the most advanced imaging technology available. Now, Intergraph offers the DMC II250, the first large-format digital aerial camera that uses a single monolithic camera (Figure 1) head to produce extreme wide-ground coverage (Figure 2).

one singLe Pan Cone – one Large CCD

The DMC II250 includes one large 17.2k x 14.6k charge-coupled device (CCD), exclusively customized by DALSA for Z/I Imaging®’s digital camera technology. The DMC II250 camera design is an evolution of the proven DMC camera technology and includes a new customized lens design by Carl Zeiss, Germany, to produce an unmatched level of high-image quality.

The single monolithic PAN camera head achieves the ultimate design goal for digital aerial camera development with one single lens for large ground coverage, the basic optics design principle for all film cameras for many decades. By eliminating potential sources of errors for geometric accuracy and radiometric quality, this new approach delivers images that exceed your require-ments for all mapping and remote sensing tasks. Fundamental design characteristics include a nadir-looking view and a single-lens projection center. The DMC II250 image data post-processing does not require CCD stitching or image mosaicking.

aDvanCeD Design

The DMC II250 is based on the DMC II camera family design. It includes five nadir-looking camera heads – four multispectral cameras for red, green, blue, (RGB) and near-infrared (NIR),

and a fifth high-resolution PAN camera head. Each multispec-tral camera has a 42 MPixel CCD (6846 x 6096 pixel) with 7.2 micron pixel size and a dedicated color filter. The focal length for the multispectral cameras is 45 millimeters (mm).

Each camera head uses a unique piezo-driven customized air-borne shutter that performs automatic self-calibration. This also ensures maximum synchronous behavior during the exposure cycle for all five camera heads.

The PAN camera includes a 250 MPixel CCD (17216 x 14656 pixel) with 5.6 micron pixel size and 112 mm focal length. The PAN camera has an infrared cut-off filter to remove the spectral wave length beyond 710 nm.

inCreaseD PerFormanCe

Our DMC II250 is a high-performance digital camera system. It has a 1.7 second frame rate to maintain high-air speed for high-forward overlap and high resolution (at 80 percent forward overlap and 5 centimeter [cm] ground sample distance [GSD], maximum air speed is 168 knots). The PAN/color ratio of 1:3.2 provides high-radiometric quality images for RGB and color-infrared (CIR). The long focal length and small pixel size deliv-ers high-resolution image data 10 cm (3.9 inch) GSD at 6562 feet (2000 meters) above ground level. A strong base-to-height ratio of 0.29 provides excellent stereo measurement accuracy. The nadir-looking monolithic PAN camera offers unmatched radiometric and geometric quality.

image Data Post-ProCessing

Image data post-processing for DMC II250 is based on the DMC post-processing software. Development has implemented the DMC II250 sensor model. The user interface is unchanged, which eliminates any training effort for existing DMC customers. Final image format after post-processing is 17216 x 14656 pixels.