Pixels and Points

• Episode #39 Does Better Positioning Really Improve Mapping Accuracy

  Hosted by Eric Andelin CP, Senior Workflow Advisor at SimActive. With guest speaker, Mohamed M. R. Mustafa, Lead Technical Authority - Mobile Mapping at Trimble Applanix. High-accuracy positioning systems, such as those developed by Applanix, are crucial for ensuring the quality of large-scale mapping projects utilizing new sensors and multi-sensor systems. When integrated into the aerial triangulation process, these systems assist photogrammetry software such as Correlator3D in generating high-quality map products like digital elevation models, orthomosaics, and 3D models.Dr. Mohammed Mostafa, a technology expert in positioning systems, understands the complexities of integration with multiple sensor systems for mapping and 3D model creation. These positioning systems also offer a direct georeferencing option when a targeting approach using ground control is not a viable option. Dr. Mostafa joins us to share his expertise in these technologies and how Correlator3D enables optimal outcomes.Specifically listeners will learn the following: • Choosing the right positioning systems• Understanding their integration with sensors• Importing positional data into Correlator3D • Quantifying achievable accuracies

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• Episode #38 Is Photogrammetry as Good as Lidar?

  Hosted by Eric Andelin CP, Senior Workflow Advisor, SimActive with Guest David Alamillo, Photogrammetry Specialist with SimActive. The two primary technologies for mapping are photogrammetry and lidar. While lidar mapping is the newer of the two, does it necessarily mean it is better? The complexity of lidar lies in all the ancillary technology required to create a viable output, whereas photogrammetry needs no additional technology remaining the simpler of the two. This prompts the question of whether established technologies like photogrammetry remain a practical solution for many mapping scenarios.Specifically, listeners will learn the following: • Choosing the right sensor• Preparing the project for processing• Measuring accuracy • Merging technologies to improve results

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• Episode #37 Creating 3D Models From Point Clouds With New Correlator3D Version 10.4

  Hosted by Eric Andelin CP, Senior Workflow Advisor, SimActive with guest speaker, Alamillo, Photogrammetry Specialist, SimActivePodcast AnnouncementWith the rise of multi-camera sensors capturing both nadir and oblique imagery, 3D models are becoming a more accessible output. The ability to collect data with multiple looks at the ground allows for the creation of very dense point clouds. These point clouds can then be used as a basis to create 3D models having the form of texturized meshes. Correlator3D version 10.4 adds improved 3D modeling capabilities and was designed to be compatible with future modeling industry improvements. Input data consists of imagery along with point clouds generated from either photogrammetry or lidar. This gives the user more flexibility from the start and potential time savings in processing. Guest David Alamillo joins us to discuss the best practices when creating 3D models in Correlator3D. Specifically, listeners will learn the following: • Understanding the optimal sensors for 3D modeling• Generating the best point cloud possible from imagery• Performing triangulation to generate a texturized mesh• Using lidar point clouds for modeling rather than photogrammetry

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• Episode #36 Mapping Corridors Without Control: Myth or Reality?

  Hosted by Eric Andelin CP, Senior Workflow Advisor, SimActive with guest speaker, Joseph “Heath” Harwood, Physical Scientist, US Army Corps of Engineers, Mobile DistrictTopicThe U.S. Army Corps of Engineers rely on the research of the JALBTCX team to support their coastal mapping and charting needs. From Hawaii to Florida, shorelines are constantly changing. Lidar, bathymetric lidar and imagery all play an important role in this program. And when imagery is part of a mission, Correlator3D is called into action. Heath Harwood of JALBTCX leads a team of employees and contractors in supporting these missions. He is aware of the challenges involved with large corridor mapping projects. Not only is terrain variation an issue, but on projects of this scale, ground control is not an option. Rather, they rely on direct georeferencing. Heath joins us to give us an overview of the program and how these challenges are overcome with Correlator3D. Specifically, listeners will learn about the following: • Planning for successful corridor mapping• Setting up a project with direct georeferencing• Understanding achievable accuracies• Editing surfaces and mosaics to improve results

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• Episode #35 Do Larger Format Sensors Increase mapping Productivity?

  Hosted by Eric Andelin CP, Senior Workflow Advisor, SimActive with guest speaker, Dr. Mohsen Miri, Director of Global Strategic Partnerships, Phase OneAerial cameras and photogrammetry are proven mapping solutions on both drones and aircraft. Phase One offers a range of imaging sensors to support each of these platforms. Along with this, they have developed an image compression technology called IIQ to support the large amounts of data being captured. Processing such large files and datasets can be challenging and workflows can be simplified by taking advantage of the IIQ format. Dr. Mohsen Miri, Director of Global Strategic Partnerships, with Phase One, joins our host Eric Andelin to discuss camera technology and image processing workflows to meet today’s mapping needs. Specifically, listeners will learn the following: • Determining your project requirements• Choosing the right imaging sensor• Understanding the impact of sensor size on processing• Simplifying your processing workflow

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