More recently, GEDI Level 4 data (released in August 2021 - see Earthdata) has been used to plot the Above Ground Biomass Density in parts of the Jura Mountains. Unfortunately, the number of GEDI scans in our region of interest (i.e., where we can access ground-truth reasonably easily) is still very limited, so it is difficult to draw conclusions at this stage. It uses a composite index made up from indeces for the forest cover, layering and understory. The structure determination is more robust and informative. The approach has been to use red-green-blue composite points corresponding to GEDI laser shots to determine forest diversity and structure. These grassy areas corresponded closely to those given by the Version 1.5 cropland and grassland map of Switzerland based on Sentinel-2 data published by Envidat.įorest diversity and structure site - IMPLEMENTATION NOTESįorest mapping has so far focusssed exclusively on using GEDI high-reolution laser satellite data. The baseline is the most heavily biomassed month (uusally June) and grassy areas was taken to be those grassy areas with a SeLI value above a certain value. The boundaries of grassy pastures are are drawn using leaflet.draw. The month-by-month biomass that is plotted in popups is monitored using the Sentinel2 Leaf Index ( Se2LI) biomass index calculated using the Copernicus Sentinel2 A and B 20 m resolution red-edge (Band 5) and near-infrared (Band 8A) bands pan-sharpened to a resolution of 10 m and captured in May to November. Pasture biomass site - IMPLEMENTATION NOTES Three-dimensional point clouds of smallish areas are viewed using the Potree viewer to estimate forest density (see IMPLEMENTATION NOTES). Panoramic views are taken using a Google Pixel 4a smartphone. JuraMap and JuraMap routing make use of a historical mapping of roads and tracks.Ī simplified version of the deprecated proof-of-concept TrekView Explorer is used for the panoramic viewing of trails. Using this map as the basis, various features are added (geological, cutural, nature and wildlife based, etc) as the basis for vitual tours of the region.Ī self-hosted OpenRouteService has been set up so that routing can be provided for JuraMap that maps paths, tracks and roads as they probably existed at the end of the 19th Century before the modern road network was built in the Jura Mountains using heavy machinery. The aim is to create as closely as possible a map of the region as it existed in 1845, the year the Dufour Map, the first map of modern-day Switzerland, was published.
INSTALL TRACCAR UBUNTU OFFLINE
OsmAnd obf files are made available for downloading to the OsmAnd app so that JuraMap maps can be used offline with a smartphone's built-in GPS (see IMPLEMENTATION NOTES). This mapping exercise is consolidated under the activity. The mapping of features based on an historical map of a region is being carried out to better understand the landscape of the Jura Mountains in the south-west corner of Switzerland above the village of Saint Cergue. JuraMap feature mapping ( ) - IMPLEMENTATION NOTES
point-clouds via a self-hosted Potree app.Interactive pop-ups (as a Leaflet-scripted modal) points of interest using a self-hosted Overpass API.point clouds (the swisstopo swissSURFACE3D product).satellite layers (Google, Bing, ArcGIS).a high-resolution topographic map layer (the swisstopo Swiss Map Raster 10 product).
a 10 cm resolution ariel image layer (the swisstopo swissIMAGE 10 product).a 50 cm Digital Elevation Model (DEM) relief layer (the swisstopo swissALTI3D product).Details are available in some cases as Implementation Notes.
The implementation of each of these technologies is described briefly.
0 kommentar(er)
