- 4 replies
- 2,949 views
- Add Reply
- 0 replies
- 1,606 views
- Add Reply
- 0 replies
- 941 views
- Add Reply
- 1 reply
- 2,444 views
- Add Reply
- 0 replies
- 1,702 views
- Add Reply
Terrain Modification with road networks
By Birdfree,
Hello, I am looking for a solution to merge elevation models with a road network. Basis is a elevation model and shape data of roads. Now I want to merge the roads with the elevation model to get flat roads in the elevation model. Do you know of any software that can do this? I have been searching for a while, but have not found a solution yet. So far I've been using Photoshop's blur to even out the color values a bit and at least get a decent result for large scales. But, the streets are sloped
NTIA's interactive broadband map highlights the digital divide
By Lurker,
The quality and cost of broadband remain issues for households across the US, and the Biden administration wants to draw attention to that unfortunate reality. The National Telecommunications and Information Administration (NTIA) has published what it says is the first interactive public map detailing the "digital divide" in broadband access. You'll not only see areas where broadband speeds fall below official targets (25Mbps down and 3Mbps up), but correlate that with high-poverty areas. You ca
Managing earthquakes triggered by oil production: Scientists demonstrate safer wastewater disposal method
By Lurker,
When humans pump large volumes of fluid into the ground, they can set off potentially damaging earthquakes, depending on the underlying geology. This has been the case in certain oil- and gas-producing regions, where wastewater, often mixed with oil, is disposed of by injecting it back into the ground—a process that has triggered sizable seismic events in recent years.
Now MIT researchers, working with an interdisciplinary team of scientists from industry and academia, have developed a meth
Landsat 7 End of Life Plans
By Lurker,
On February 7, 2017, the twentieth and final inclination (Delta-I) maneuver of Landsat 7 took place. (Delta-I maneuvers keep the spacecraft in the correct orbital position to ensure it maintains its 10:00 am ± 15 minutes mean local time (MLT) equatorial crossing.) Landsat 7 reached its peak outermost inclination boundary of 10:14:58 MLT on August 11, 2017.
Landsat 7 is now drifting in its inclination and will fall back to 09:15 am MLT by July 2021. The chart below illustrates the inclinati
Mapping Shows Africa Has Plenty of Groundwater
By Lurker,
Many of Africa’s agricultural endeavors have long been tied to whims of the weather. When it rains, a country’s gross domestic product might soar. When it doesn’t rain, economies suffer. The reliance has been driven in part by the perception that dry, arid Africa has limited water resources. But a new study, years in the making, shows a different reality.
As one South African scientist recently noted, if all the rainfall stopped today and for the next 100 years in Africa, there would still
-
Forum Statistics
8.7k
Total Topics43.4k
Total Posts
-
Latest Posts
-
Hello! Hello! Join us on Wednesday [GIS DAA] for a zoom webinar as we discuss "The Future of GIS: Emerging Technologies and Global Impact in Different Sectors" and "GIS for Sustainable Development." Our event will feature two distinguished key speakers, senior specialists in the field, who will enlighten us with their insights and expertise. Save the date and stay tuned for more details on this exciting opportunity to explore the cutting-edge advancements and societal applications of Geographic Information Systems. Here is the registration link: https://shorturl.at/f5W68 See you there! #IRESexperience -
Sometimes you need to create a satellite navigation tracking device that communicates via a low-power mesh network. [Powerfeatherdev] was in just that situation, and they whipped up a particularly compact solution to do the job. As you might have guessed based on the name of its creator, this build is based around the ESP32-S3 PowerFeather board. The PowerFeather has the benefit of robust power management features, which makes it perfect for a power-sipping project that’s intended to run for a long time. It can even run on solar power and manage battery levels if so desired. The GPS and LoRa gear is all mounted on a secondary “wing” PCB that slots directly on to the PowerFeather like a Arduino shield or Raspberry Pi HAT. The whole assembly is barely larger than a AA battery. It’s basically a super-small GPS tracker that transmits over LoRa, while being optimized for maximum run time on limited power from a small lithium-ion cell. If you’re needing to do some long-duration, low-power tracking task for a project, this might be right up your alley. https://hackaday.com/2024/10/17/tiny-lora-gps-node-relies-on-esp32/
-
Multiple motors or servos are the norm for drones to achieve controllable flight, but a team from MARS LAB HKU was able to a 360° lidar scanning drone with full control on just a single motor and no additional actuators. Video after the break. The key to controllable flight is the swashplateless propeller design that we’ve seen a few times, but it always required a second propeller to counteract self-rotation. In this case, the team was able to make that self-rotation work so that they could achieve 360° scanning with a single fixed LIDAR sensor. Self-rotation still needs to be slowed, so this was done with four stationary vanes. The single rotor also means better efficiency compared to a multi-rotor with similar propeller disk area. The LIDAR comprises a full 50% of the drone’s weight and provides a conical FOV out to a range of 450m. All processing happens onboard the drone, with point cloud data being processed by a LIDAR-inertial odometry framework. This allows the drone to track and plan its flight path while also building a 3D map of an unknown environment. This means it would be extremely useful for indoor or underground environments where GPS or other positioning systems are not available. All the design files and code for the drone are up on GitHub, and most of the electronic components are off-the-shelf. This means you can build your own, and the expensive lidar sensor is not required to get it flying. This seems like a great platform for further experimentation, and getting usable video from a normal camera would be an interesting challenge. Single Rotor Drone Spins For 360 Lidar Scanning | Hackaday
-
The fall update to Global Mapper includes numerous usability updates, processing improvements, and with Pro, beta access to the Global Mapper Insight and Learning Engine which contains deep learning-based image analysis tools. Global Mapper is a complete geospatial software solution. The Standard version excels at basic vector, raster, and terrain editing, with Global Mapper Pro expanding the toolset to support drone-collected image processing, point cloud classification and extraction, and many more advanced image and terrain analysis options. Version 26.0 of Global Mapper Standard focuses on ease-of-use updates to improve the experience and efficiency of the software. A Global Search acts as a toolbox to locate any tool within the program, and a source search in the online data streaming tool makes it easier to bring online data into the application. Updates for working with 3D data include construction site planning to keep all edited terrain for a flattened site within a selected area and the ability to finely adjust the vertex position of 3D lines in reference to terrain in the Path Profile tool. Perhaps the largest addition to Global Mapper Pro v26.0 is the availability of the new Insight and Learning Engine which provides deep learning-based image analysis. Available with Global Mapper Pro for a limited time for users to test and explore, users can leverage built-in models for building extraction, vehicle detection, or land cover classification. These models can even be fine-tuned with iterative training to optimize the analysis for the data area.
-
-
Latest Topics
-
-
Recent Achievements
-
