The science and art of producing maps had been subjected to the changes as a result
of new recent techniques developments at space photogrammetry, that lead to appearance
of programs and applications in the computer's world. This associated with th
e advent of
information age and Geographic information system that changed the traditional
topographic map from just a map to an analyzing and viewing tool.
All Syrian Topographic maps are old, out dated, and largely exist in paper form. Due
to the high cost of aerial photography, These maps have not been updated for many years
and such are not useful for planning. Therefore, there is an urgent need to produce new
maps using high resolution satellite images.
The research put a method for updating topographic maps of Al-Bahlolia district
which have scales (1/50000) and (1/200000), By using Cartosat1 images.
After updating, The results were that there is increasing in the area of planted land. In
addition to building developments, increasing of length and density of roads between and
inside villages. Contour lines also have been generated automatically, so efforts and time
were be saved.
Digital Elevation Model
Satellite Images
الخرائط الطبوغرافية
المرئيات الفضائية
برنامج نموذج الارتفاع الرقمي
برنامج خاص بتطبيقات المساحة التصويرية
بمعالجة المرئيات الفضائية
التوجيه الداخلي و الخارجي
بناء الطبقات الهرمية
التصحيح العمودي
Topographic maps
(Leica Photogrammetry (LPS
Erdas Imagine
Interior and Exterior Orientation
Compute Pyramids
Ortho Rectification
المزيد..
3D data, extracted from stereoscopic images, are considered as the main input for
digital modeling and GIS database construction. These data are usually collected by using
professional software. This kind of tools, is difficult to use by the non-sp
ecialists.
In this study, we propose to use the free academic photogrammetric softwares that
are available in the internet, to achieve interior and exterior orientations of images. But,
before this step, these softwares must be evaluated. In our research, we applied a software
developed by an academic photogrammetric society. The software was applied to calculate
the orientation parameters of a stereoscopic pair of aerial photos taken for an urban area.
After that, the results were evaluated by the help of a professional photogrammetric
software. Finally, a group of stereoscopic analysis was done by using the academic
software. Again, the results were evaluated by the help of a professional software.
