Apple segmentation in 3D point clouds
This internship aimed at segmenting apples from a high-resolution Terrestrial Lidar Scan (TLS) Point Cloud with a simple clustering approach and a deep learn...
Posts by Year
2024
A U-Net-SegmentAnything 2-pass approach with stereo-depth sensing for river-pebble panoptic segmentation
Introduction Sediment charateristics and grain-size distribution carries important information on the drainage system, the ecosystem, and the weather conditi...
Climate Data Collection and Analysis, Kathmandu, Feb 26-27 2024
Workshop organized and led by Dr Taylor Smith (University of Potsdam, Germany), Dr Bodo Bookhagen (University of Potsdam, Germany) and Dr Shakil Regmi (South...
Structure from Motion Application for Landslide Characterization and Monitoring
On January 9th, 2023, a catastrophic landslide severely impacted the upper basin of Chontaduro Creek, located in the municipality of Rosas-Cauca in southwest...
Generation of high-resolution digital topography of a rugged anticline using SPOT-6 satellite images and the NASA Ames Stereo Pipeline
Regional-scale Earth surface process analyses require cost-effective, large-area coverage, high-resolution digital elevation models (DEMs). Stereogrammetry, ...
2023
A line-based segmentation and subsampling approach for classifying point clouds using the random forest algorithm
Dense point clouds generated from Terrestrial Lidar Scanner pose a challenge to classification algorithm because of their large data amounts. Here a scanline...
Terrestrial Laser Scanning in Campus Golm: Data Acquisition and Attributes
Collection of full-waveform terrestrial LiDAR data poses unique challenges during data acquisition and generates data with useful extra attributes. The scann...
Point cloud registration: TLS 3-D model of the Golm campus at the University of Potsdam
In the last two decades, Terrestrial Laser Scanning (TLS) has gained increasing importance as a ground-based remote sensing technique for measuring three-dim...
Installing conda environments for spatial and remote-sensing analyses
Conda environments provide an easy way to install relevant packages for a python environment. Here, we present a ‘Spatial Data Analysis’ (SDA) environment th...
Understanding weight maps and label manipulation in tree detection from high-resolution orthophotos with U-Net
Fine individiual tree crown delineation can be achieved from RGB + NIR orthophotos using CNN-based semantic segmentation with weighted losses, but how do dif...
Geometric-based filtering of ICESat-2 ATL03 data for ground-profile retrieval in the Quebrada del Toro, Argentina
The ICESat-2 mission provides new potential to observe geomorphic processes with a step size of 70 cm. Here is an application of a custom filtering approach ...
2021
Detecting ENSO events using GRACE satellites in South America
Changes in global Total Water Storage (TWS) can be measured with satellites sensitive to gravity acceleration using the Gravity Recovery and Climate Experime...
Climatic and Biotic Controls on Topographic Asymmetry at the Global Scale
Neighboring terrain facing in different directions is not equally steep. This effect is caused by the complex interactions of geology, tectonics, vegetation,...
2020
Remote Sensing of Earth Surface Processes - Spring 2021 RS-ESP Seminar Schedule
Preliminary seminar schedule for January/February 2021.
Causes of reduction in airborne NO2 and CO emissions in Europe during the COVID-19 crisis
Road traffic reduction during the spring 2020 lockdown caused significant NO2 decrease.
Example of SAOCOM processing with ISCE
First results from processing interferograms from SAOCOM - an Argentinean L-band SAR satellite - and ISCE.
Converting BBB recordings to MP4 with Webcam on Deskshare Movie
Convert your BBB recordings to a compressed MP4 stream with webcam overlay and logo.
Running Jupyter Notebooks on a Android tablet
Connect your keyboard to your tablet and get ready to run Jupyter Notebooks on Android systems!
Using an iPad or Samsung Galaxy with Android as Whiteboard
Can you use your Samsung Galaxy or iPad as an input device / whiteboard for online teaching?
Lidar and SfM Point Cloud Python KDTree Comparison
This short entry describes a comparison of KDTree implementations for Lidar PointClouds (PC) and Structure-from-Motion (SfM) dataset.
RAPIDS.AI Install on Ubuntu
There are different software packages available for using NVIDIA CUDA/OPENCL architectures.
NVIDIA CUDA Install on Ubuntu 18.04 / 20.04
CUDA processing has become an integral part of data-intensive processing. Installation is still cumbersome and changes when new versions become available.
Miniconda Environments Oct 2020
Update on Conda Install.
Geomorphology from Synthetic Aperture Radar (SAR) Coherence
Satellites carrying synthetic aperture radar (SAR) instrumentation are providing novel and exciting opporutnities to perform geomorphological analysis from s...
Workshop Quantitative Geomorphology at IIT Gandhinagar
Using Python, Pointclouds, and DEMs to understand landcape evolution at various timescales.
InSAR first results: Earthquake on Nov-30 2020 in NW Argentina, Central Andes
An Earthquake occurred in NW Argentina on Nov-30, 2020.
2019
Point Cloud Workshop at the University of Potsdam
We organized a workshop ‘From point clouds and full-waveform data to DEM analysis’ from Sep-30 to Oct-4 2019 at the University of Potsdam. Thanks to the StR...
Plot SAM topography, USGS earthquake data, NDVI and rainfall with GMT
South America is characterized by steep gradients in tectonism, topography, and climate. In this blog entry, we show how these gradients can be visualized do...
Plot ECMWF wind vectors with GMT
Using GMT to merge topographic and wind-vector data for visually-appealing maps.