COMPARISON OF DIGITAL PHOTOGRAMMETRIC SOFTWARE IN THE (original) (raw)
Photogrammetry is a discipline where several output such as Orthophoto, digital map contour lines, three dimensional coordinates and others can be produced from aerial photograph. The orthophoto is a photographic representation on which effect of terrain height and camera attitude are removed. The orthophoto constitutes a platform on which accurate measurement can be done which is similar to a map. A map or topographic map is commonly produced using photogrammetric technique. With the advances in computer hard, software and digital technique, photogrammetry has embraces this advances. Today the photogrammetry discipline is known as digital phothogrammetry. In digital photogrammetry, product such as digital a orthophoto and digital map can be produced within short period. These outputs are becoming very popular and very useful to Geographical Information System (GIS) community. The aim of this study is to assess the accuracy of digital orthophoto and digital map produced using tow digital photogrammetric softwares known as ERDAS and PCI. A good understanding of photogrammetry and its component is essential. A well structured criteria was used to assess the accuracy of the digital Orthophoto and digital map produced from the analysis. From this study, based on the findings it was found that PCI software produces superior results or accuracy compared to Erdas software. Even though Erdas software produces less accurate results, it has other function that is superior than the PCI software. In this study, it can be concluded that user should select appropriate software to produce accurate results in producing photogrammetric output.
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