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. Although personal computers, smartphones and software for viewing 3D digital maps are available, online tools must be provided to aid people in different countries in visualising good locations for navigation and planning. This work presents a methodology for implementing geoinformatics to produce a 3D city model by using free rectified satellite imagery and stereo aerial imagery as data sources. Although satellite imagery has a low resolution (Thus, results will not be accurate if compared to aerial imagery.), the imagery is used to evaluate the potential of implementing such data for developing countries with limited access to data and resources. Satellite imagery with limited resolution can be used to produce models in LoD1 according to CityGML. For enhanced building details (i.e. LoD2) and an accurate 3D model, stereo aerial imagery is adopted, but this high-resolution method is costly. High-accuracy stereo aerial imagery is used to evaluate the model produced from the free satellite imagery. Finally, the results are published for online viewing.

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

CITY MODELLING USING GEOINFORMATICS: A CASE STUDY OF THE COLLEGE OF ENGINEERING CAMPUS, SALAHADDIN UNIVERSITY, IRAQ