Digital base maps generated from various source imagery, such as satellite imagery, airborne data, and aerial photograph, are becoming very useful and efficient. Digital map can provide detailed topographic, land-use and land-cover information on earth. With the growing requirements of automatically correcting raw data and generating digital maps, the technique which can be used for that purpos...

Orthophoto imagery is a very beneficial layer in a GIS as it provides a generic, inexpensive, and accurate base map. However, in cities with tall buildings, the creation of a seamless database of orthophoto imagery is difficult. Traditional methods for orthophoto rectification do not consider buildings. Therefore, features at street level are hidden due to building lean. Using a GIS to overlay ...

abstract: fortunately in recent years in iran, semiotics arguments in literature and art study are noticed by researchers. in according to, the denotation and connotation functions in photography are updated and expanded. thus, necessary bases for continuing this argument are available. although denotation and connotation are belong to semiotics area, but in photography, specially critique of p...

Many different disciplines use deep Learning algorithms for various purposes. In recent years, object detection by learning from aerial or terrestrial images has become a popular research area. this study, application was performed training the YOLOv2 and YOLOv3 in Google Colaboratory cloud service with help of Python software language DOTA dataset consisting photographs. 43 photographs contain...

This research work is concerned with the implementation of a shape from shading (SFS) technique for automatically generating a digital terrain model (DTM) using a single digitized aerial photograph of a terrain area with low signal (information) content. The mathematical model for the SFS is established based on the fact that the pixel’s gray level variations in image space are proportional to ...

ABSTRACT: This paper proposes the method to develop a high-resolution image of urban properties from frequently observed low-resolution images based on the statistic process assuming urban properties have little temporal change. Because disaster responders sometimes have difficulty to obtain the map data in a digital form especially in developing countries, it is well known that satellite image...

Aerial photographs have been evaluated manually by the operators for a long time for the extraction of the vector data. The development of computer technology and digital image processing technologies provide to perform these extraction processes automatically or semi-automatically. Image segmentation can be used for automatic and semi-automatic feature extraction and classification of images. ...

Landslides are among the most damaging natural hazards in mountainous regions. In this study, landslide hazard zonation was conducted in the Baba Heydar Watershed using logistic statistical regression to determine landslide hazard areas. First, a landslide inventory map was prepared using aerial photograph interpretation and field surveys. Next, ten landslide conditioning factors including alti...