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Up until now, the process of creating a mosaic of hundreds if not thousands of orthorectified aerial images is extremely time-consuming. A conventional computer program has to analyze each image taken and figure out its exact angle and camera position in order to build a model of a piece of land. Computer software does this by looking at common features in adjacent photos and marking them with tie points. In an image of a cornfield, for example, it might use a corn plant that shows up in two photos. The computer then adjusts its calculation of the camera positions for all the photos at once so that the different images match up to produce one coherent projection of a tie point. From there, all the tie points can be projected onto a 3D model and a mosaic is created. The problem is that current software is only equipped to handle a few hundred images. Once the number of images is more than a thousand, the typical amount gathered by a drone, the process can take well over 1000 hours. To remedy the situation, computer scientist Mark Pritt, along with colleagues at Lockheed Martin in Gaithersburg, Maryland, developed a new algorithm to handle thousands of images and speed up the process. Their computer program takes the tie points from each photo and projects then directly onto a 3D space. This is without knowing the exact shape of the land or the position of the camera. Consequently, tie points do not always match up. The same corn plant could have two projections on the model. When two tie points don’t match up, though, the computer program instinctively takes the middle point between the two and adjusts the camera position accordingly. It does this one image at a time, and once the software tweaks the camera position for all the photos, it repeats the entire process again to fix any errors that occurred. Overall, the result is that the process of analyzing images is sped up dramatically. What would have taken over a thousand hours can be done within 24 hours or less. Now that this new software can handle a higher amount of images, drones could see considerable action in mapping. They can be used to produce high-resolution images of crops that could inform farmers’ decisions of how to take care of their fields. They could also be utilized for disaster relief. If an earthquake strikes, drones could collect images of the affected areas for relief workers. This could be done all at a cheaper price than the costs of using planes or purchasing satellite images. The next step, according to researchers, is improving this process so that maps from drones could be produced in a matter of minutes. http://www.aipr-workshop.org/AIPR%202014/AIPR%202014%20Final%20Program.pdf http://news.sciencemag.org/technology/2014/10/drones-could-3d-map-scores-hectares-land-just-few-hours

This software can also be useful http://pix4d.com/products/ Pix4Dmapper Pix4Dmapper automatically processes terrestrial and aerial imagery acquired by light-weight UAV or aircraft using its innovative technology based purely on image content. And converts your images into highly precise, customizable and timely results for a wide range of GIS and CAD applications. http://pix4d.com/download/

The Build Elevation Mosaic Tools toolbox Building mosaic dataset makes it simple to publish collections of elevation data files as elevation, slope, aspect, and hillshade layer services, so they do not have to be re-created for each use. This approach reduces data duplication because the source files do not need to be copied to be used in the mosaic dataset. They can be used from their existing locations as long as ArcGIS for Server can access them as a data store. When publishing the results, you can reduce the number of services by applying the raster function templates included with the tools in this toolbox. These function templates modify pixel values on the fly to show derived views of the elevation data, such as percent slope, aspect, and hillshade. The client simply chooses which function to view from the DTM service. DOWNLOAD https://github.com/Esri/solutions-geoprocessing-toolbox/releases/tag/v10.2.2.1

To add to this I would like to mention that ArcGIS 10.1 has got improved features. Specific to Geoprocessing tools you can pakage the tool box and share the tool package as we could earlier share the map package. Yes we designing the model could be bit complex when you are not familiar with the Geoprocessing models. For someone who has been working with Geoprocessing models and tools since earlier version of ArcGIS 9x would find the model tools and model iterators as a good aid for designing the models. Regards, Harshal