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Dieser OGC konforme WebCoverageService stellt das Digitale Oberflächenmodell (DOM) bereit. Das Digitale Oberflächenmodell (DOM) beschreibt im Gegensatz zum Digitalen Geländemodell DGM nicht die Höhe des natürlichen Erdbodens (Gelände), sondern die Höhe der Oberfläche der auf der Erde befindlichen natürlichen und künstlichen Objekte (z. B. Vegetation, Gebäude, Fahrzeuge). Es handelt sich hierbei um ein auf einer Laserscanbefliegung basierendes Situationsmodell. Maßstab: 1:null; Bodenauflösung: 1m; Scanauflösung (DPI): null
The effects of a phytoplankton bloom and photobleaching on colored dissolved organic matter (CDOM) in the sea-surface microlayer (SML) and the underlying water (ULW) were studied in a month-long mesocosm study, in May and June of 2023, at the Institute for Chemistry and Biology of the Marine Environment (ICBM) in Wilhelmshaven, Germany. The mesocosm study was conducted by the DFG research group BASS (Biogeochemical processes and Air–sea exchange in the Sea-Surface microlayer, Bibi et al., 2025) in the Sea Surface Facility (SURF) of the ICBM. The facility contains an 8 m × 1.5 m × 0.8 m large outdoor basin with a retractable roof, which was closed at night and during rain events. The basin was filled with North Sea water from the adjacent Jade Bay. Homogeneity of the ULW in the basin was achieved by constant mixing of the water column. The daily SML and ULW samples were collected alternating in the morning, about 1 h after sunrise, and in the afternoon, about 10 h after sunrise. The alternation of sampling times intended to capture a potential effect of sun-exposure duration on DOM transformations and elucidated the day and night variability of the layers. The SML was collected via glass plate sampling (Cunliffe and Wurl, 2014). The ULW was sampled via a submerged tube and a connected syringe suction system in 0.4 m depth. The removed sample volume was refilled with Jade Bay water every day. SML and ULW samples were filtered through pre-flushed 0.7 µm Whatman GF/F and 0.2 nucleopore filters into clear 40 ml SUPELCO bottles. These bottles were acid-washed twice and combusted at 500 °C for 5 h. The samples were stored dark and at 4 °C and measured within a few months of the study. FDOM was measured using a Aqualog fluorescence spectrometer (Horiba Scientific, Japan) with 10 seconds integration time and high gain of the CCD (charge-coupled device) sensor within an excitation range from 240 to 500 nm, and an emission range from 209.15 to 618.53 nm. The Aqualog measures fluorescence as well as absorption. The resulting data includes an excitation-emission-matrix (EEM) of the blank (MilliQ Starna cuvette), an EEM of the sample, and the absorption values of the sample. The raw exported Aqualog data was corrected for errors and lamp shifts. The corrected EEM data is then decomposed by PARAFAC (Murphy et al., 2013) for its underlying fluorophore components. Before running the PARAFAC routine, the corrected data needed to undergo a correction process by subtracting the blank from the sample EEM and canceling the influences of the inner-filter effect (IFE, Parker & Rees, 1962; Kothawala et al., 2013). The fluorescence intensity of the IFE-corrected EEM is calibrated by using the Raman scatter peak of water (Lawaetz & Stedmon, 2009). For PARAFAC the corrected data was processed using the drEEM and NWAY toolbox (version 0.6.5; Murphy et al., 2013) in MATLAB (R2020b). A 4-component model was validated with the validation style S4C6T3 for the split half analysis with nonnegativity constraints and 1-8e as the convergence criteria with 50 random starts and a maximum number of 2500 iterations. The resulting final model had a core consistency of 82.04 and the explained percentage was 99.54%. Furthermore, four fluorescence indices were calculated from the corrected EEM data (HIX – Humification index, Zsolnay et al., 1999; BIX – Biological index, Huguet et al., 2009; REPIX – Recently produced index, Parlanti et al., 2000, Drozdowska et al., 2015; ARIX, Murphy, 2025).
Digitale Höhenmodelle (DHM) beschreiben das Gebiet des Freistaates Sachsen durch dreidimensionale Koordinaten. Grundlage dafür bildet die klassifizierte Laserscan-Punktwolke (Höhengenauigkeit +/- 0,15 m), aus der die Bodenpunkte zu einem Digitalen Geländemodell (DGM, Bodenauflösung 1 x 1 m) bzw. zusätzlich die Nichtbodenpunkte (u. a. Vegetation, Gebäude) zu einem Digitalen Oberflächenmodell (DOM, Bodenauflösung 1 x 1 m) verrechnet werden. Die Abfrage der Gelände- und Oberflächenhöhe, der Höhendifferenz (wahre Objekthöhe, nDOM), der Geländeveränderung (Differenz zur vorherigen Datenerhebung) sowie der Hangneigung erfolgt über die Sachdatenabfrage (GetFeatureInfo, Höhenangabe im Höhenreferenzsystem DHHN2016, EPSG: 7837). Die Höhenlinien wurden aus dem Digitalen Geländemodell (DGM) automatisch abgeleitet, haben eine Äquidistanz von 2,5 Metern und sind nicht kartographisch aufbereitet. Aufgrund der kachelweisen Erzeugung kann es zu Linienunterbrechungen und leichten Versätzen kommen. Über die Kartenebene 'Beschriftung' können Ausdrucke mit einem beschrifteten Punktraster der Geländehöhe erzeugt werden. Verwenden Sie alle Kartenebenen (Layer) dieses Dienstes, setzen Sie die Kartenebenen in Ihrer Anwendung (Client) halbtransparent, um das Relief zu erkennen. Die Reliefdarstellung (Schummerung) mit Überhöhung ermöglicht die Erzeugung eines Kartenbildes mit 3D Effekt, wenn die darüberliegenden Fachdatenlayer halbtransparent angezeigt werden. Weitere fachliche Details unter: https://www.landesvermessung.sachsen.de/fachliche-details-8645.html
The effects of a phytoplankton bloom and photobleaching on colored dissolved organic matter (CDOM) in the sea-surface microlayer (SML) and the underlying water (ULW) were studied in a month-long mesocosm study, in May and June of 2023, at the Institute for Chemistry and Biology of the Marine Environment (ICBM) in Wilhelmshaven, Germany. The mesocosm study was conducted by the DFG research group BASS (Biogeochemical processes and Air–sea exchange in the Sea-Surface microlayer, Bibi et al., 2025) in the Sea Surface Facility (SURF) of the ICBM. The facility contains an 8 m × 1.5 m × 0.8 m large outdoor basin with a retractable roof, which was closed at night and during rain events. The basin was filled with North Sea water from the adjacent Jade Bay. Homogeneity of the ULW in the basin was achieved by constant mixing of the water column. The daily SML and ULW samples were collected alternating in the morning, about 1 h after sunrise, and in the afternoon, about 10 h after sunrise. The alternation of sampling times intended to capture a potential effect of sun-exposure duration on DOM transformations and elucidated the day and night variability of the layers. The SML was collected via glass plate sampling (Cunliffe and Wurl, 2014). The ULW was sampled via a submerged tube and a connected syringe suction system in 0.4 m depth. The removed sample volume was refilled with Jade Bay water every day. SML and ULW samples were filtered through pre-flushed 0.7 µm Whatman GF/F and 0.2 nucleopore filters into brown bottles and were stored dark and at 4 °C until measurement within weeks of the study. The brown bottles were previously combusted at 500 °C. CDOM was measured with three liquid waveguide capillary cells (LWCC, WPI, USA) of different pathlengths (10 cm, 50 cm, 250 cm) to increase the measurement sensitivity following the protocols of Röttgers et al. (2024) using a spectral detector (Avantes, Netherlands) for a total spectral range from 230 to 750 nm. A sodium chloride (NaCl) solution was used for the salinity correction. The blank-corrected absorbance spectra were then converted into Napierian absorption coefficients (Bricaud et al., 1981).
INSPIRE-Datensatz zum Annex2-Thema Höhe für das Bundesland Sachsen-Anhalt. Der Datensatz wurde aus den Daten des Digitalen Oberflächenmodells mit Gitterweite 1m (DOM1) abgeleitet und INSPIRE-konform transformiert. -Dieser Datensatz steht ausschließlich bei online-Abruf kostenfrei zur Verfügung.-
Digitale Orthophotos mit einer Bodenpixelgröße von 20cm x 20cm (ATKIS®-DOP20) werden aus Luftbildern der Befliegungen des Landes hergestellt. Dabei werden durch Umbildung die perspektivischen Verzerrungen der Luftbilder beseitigt und ein Bild mit Parallelprojektion erzeugt, welches einen über die ganze Bildfläche einheitlichen Maßstab hat. In den Orthophotos können somit Strecken und Flächen gemessen werden. Mit dem Bildflug 2019 wurde bei den Digitalen Orthophotos die neue Qualität True Orthophoto - TrueDOP eingeführt. Sie entstehen durch eine Entzerrung der Luftbilder mit Hilfe eines bildbasierten Digitalen Oberflächenmodells (bDOM). Inhaltlich unterscheiden sich TrueDOP von den bisherigen DOP, insbesondere durch den Wegfall der Umklappeffekte der auf der Erdoberfläche stehenden Objekte, das heißt man blickt senkrecht von oben auf diese.
Der Datensatz enthält die Grenzen der Laserscanaufnahmen seit 2005.
Ein DOM‑Mesh stellt die sichtbare Oberfläche (Gebäude, Vegetation, Gelände) in 3D dar. Es wird aus Luftbildern und einem digitalen Oberflächenmodell (DOM) abgeleitet und texturiert.
Das Digitale Oberflächenmodell (DOM) beschreibt die Oberfläche der Erde, der Vegetation und der Bebauung durch die räumlichen Koordinaten einer repräsentativen Menge von Boden- und Nichtbodenpunkten. Die Aktualisierung erfolgt ab 2020/2021 im 6-Jahres-Turnus, allerdings in neuen Losabgrenzungen. Die Umstellung auf die neuen Lose wird voraussichtlich mit dem Winter 2025/2026 abgeschlossen werden.
Data were collected between August 2018 and January 2022 as part of the research unit DynaCom (Spatial community ecology in highly dynamic landscapes: From island biogeography to metaecosystems) of the Universities of Oldenburg, Göttingen, and Münster, the iDiv Leipzig and the Nationalpark Niedersächsisches Wattenmeer. Measurements were conducted almost bi-/monthly on experimental islands and salt marsh enclosed plots located in the back barrier tidal flat and salt marsh of the island of Spiekeroog (Germany). Field-based in situ measurements of salinity, temperature, and pH were conducted using portable hand-held instruments in groundwater (filter tubes within experimental plots) and in surface waters from a tidal channel (ITC) adjacent to the experimental islands and a tidal pond (STP) in the pioneer zone of the salt marsh. Measurements were performed and samples were taken during the day between 3 hours before and 3 hours after low tide. From August 2018 to September 2019 a HQ40D digital two-channel multi meter equipped with a pre-calibrated Intellical CDC401 field 4-pole graphite conductivity cell (Hach Lange GmbH, Germany) was used to measure temperature (°C) and salinity (psu). The same device was used for pH measurements with an Intellical PHC101 field low maintenance gel filled pH electrode (Hach Lange GmbH, Germany). The pH electrode was calibrated before each fieldwork using single-use pH buffer solutions (pH 4.01, 7.00, 10.01, Hach Lange GmbH, Germany). Since October 2019, salinity and temperature were measured using a Multi 3510 IDS SET 4 handheld device equipped with a TetraCon® 925/LV 4-Pol-IDS conductivity electrode with graphite cells (WTW, Xylem Analytics Germany GmbH, Germany). Fluorescent dissolved organic matter (FDOM, ppb QSE) was measured using an AquaFluor Modell 80000-010 for UV-420 (Turner Designs Inc., USA), pre-calibrated in the laboratory. For this, water samples were taken from the field to a nearby mobile central field unit and were filtered within 1-2 hours after sampling using 25 mm Nuclepore syringe filters (0.2 µm pore size) directly into sample-pre-rinsed measurement cuvettes. Data quality control (QC) was performed using MATLAB (R2024b). Outlier detection was conducted both visually and statistically using z-score analysis (|z| > 3) per sampling campaign and plot. Each data point was assigned a Quality Control Flag (QC).
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