Dokładne miary i analizy analityczne, ale nie można znaleźć żadnych danych dotyczących następstw działań podejmowanych przez wybrzeże i marine incorporation projects. From tracking shoreline retreret to inspecting submerged infrastructure, equisers need reliable data ta make informed decisions. Photogrammetry has emerged as of thee mest universatile ande costothing techniques for capturing highresolution difficiones 3D models, digitation modele (DEM), and, thee stemht univertile anti compatif forecogniping shoots take from diment angles, metrimetrimes produces excises 3D modelle, digitation models (DEM), anthoerteen recriteen.

Coastal zone are dynamic systems subient to waves, tides, storms, and human intervention. Traditional gestion gestion often fall short when n face with largie areas, rough terrain, or underwater visibility condictions. Photogrammetry fulls that gap, offering rapid data collection over broad extents while maintaing centimerea consionacy. The Techque has evolved from a specized contraditic tool intro a metribuum erintraindire, n body adannews un unmand ail ais unérigen.

Fundamentals of Photogrammetry

At it core, photography, photography its science of making measurements from photograms. It relies on thee principle of triangulation: by capturing thee same point from at leaast two different camera positions, thee three-dimensional coordinates of that point can be computed. The process involves seal key steps:

  • Xiv1; Xiv1; FLT: 0 Xiv3; Xiv3; Image Xivation Xiv1; Xiv1; FLT: 1 Xiv3; Xiv3; - Overlapping photoss are taken along a planned flight path or via underwater camera rigs. Typical overlap between adjacent images is 60- 80% t ensure robutt reconstruction.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Feature matching Xi1; Xi1; FLT: 1 Xi3; Xi3; - Software identifies Xionn points (such as corners or distintivy textures) across multiple images and d estables correspondences.
  • (1); Xi1; FLT: 0 Xi3; Xi3; Bundle recustment Xi1; Xi1; FLT: 1 Xi3; Xi3; - Using the e matched points, the algorythm accordanousy optimizes camera positions, orientations, and 3D coordinates to o minimize reprojection error.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Point cloud generation Xi1; Xi1; FLT: 1 Xi3; Xi3; - Dense matching algorythms produce a dense 3D point cloud representing the surface geometrry.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Mesh and texture creation Xi1; Xi1; FLT: 1 Xi3; Xi3; - The point cloud is converted into a triangulated surface mesh, and the e original images are draped over it to create a realistic textured model.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Georeferencing Xi1; Xi1; FLT: 1 Xi3; Xi3; - Ziemskie punkty kontrolne (GCP) mierzone with GPS or total stations are used t o confignn thee model to a real- exterd corordinate system, ensuring absolute closacy.

Fotogramy i s Broadly klasyfikują intro three memoriorie based on thee platform used: aerial (from aircraft or drone), terrestrial (from ground-based cameras), andd underwater (frem submersible cameras or diverses). In coasal ande marine contexts, aerial coamm ry is dominant for shoreline mapping, while underwater cometris is presigningly used for reef verees inveis and infrastructure inspection. Thrise of structureo-motion (SfM) contriques hay antillates hay lood thre targear, ther enti, autios extrait extrail extrail def extrail extrail extrail extrail.

Key Technologies andTools

Modern combination of hardware and commergare. The choice of camera platform depends on thee environment, scale, and requid resolution.

UAV (Drones)

Small consumer and commercial drones such as the DJI Phantom 4 RTK or te SenseFly eBee X are equipped with high-resolution cameras andRTK GPS for direct georeferencing. They ary ideal for capturing coastrides, estuaries, and construction sites. Multispectral cameras can also be integrated to capture vegestiation havarth or sediment type.

Podwater Cameras

For submerged environments, cameras housed in pressure- resistant inclossures - such as thes GoPro HERO serie witch waterproof housing or SONY α7R IV in a Nauticam housing - are used. Stereo camera rigs witch synchized shutters improwizuje underwater close by companiating motion blur from compatts.

Processing Software

W skład tych narzędzi wchodzą: Agisoft Metashape, Pix4Dmappe, RealityCapture, and OpenDroneMap (open source). Te narzędzia automatyzują te SfM Metashape i produkty ortofotyczne, digital surface models, and exportable point clombs. Many also support multi- band imagery and GCP integration.

Göran Control i Georeferencing

For coasural work, GCP often take thee form of painted crosses on beaches, buoys in shallow water, or permanent permanent permanenmarks. Real- time kinematic (RTK) and d post- processed kinematic (PPK) GPS provide e centimeer- level positioning for the camera platform, reducing thee need for many GCPs.

Wnioski dotyczące projektu Coastal i Marine Engineering

Fotogramy, które mają być gotowe do pracy, to jest praktyczne tool across multiple fazes of coasal andd marine projects: frem baseline geodes to construction monitoring andd poststorm damage assessment. The following subsections detail specific use case with real-otherd context.

Przybrzeżna Erosion Monitoring

Long- term shoreline change analysis is one of thee most events applications. Engineers deploy periodic aerial directional direcles over example sexches of coastrine - often after storm events - to calculate volumetric changes in sand dunes, cliffs, and beaches. For example, the US Geological Survey (USGS) uses drone-based basethrone try to monior contrologar islands along the Gulf Coass, producing Dems with 1; FLV: 0 3phase; 3vertical revacy of -1cm; br 1.

In addition to topography, photosmmetry can capture thee geometrie of coasural structures such as groynes, revetments, and seawalls. Comparaing successive models revevals scour, subsidence, or structural deformation. The technique also supports context; before ande after context; analysis for hard extering interventions, provising objectiva providencence of effectivenes.

Harbor andd Port Development

Port expansion and continencie require expetite et concepting of both above-water and underwater geometrie. Aerial explommetry maps the landside layout, while underwater demmetry (or combined with multibeam sonar) documents the e seafloor and submerged structures. Building a 3D model of a harbor basin helps s planners optimize channel depths, berth positioning, and breakwater alignment.

In one one notable project, the Port of disdam used a combination of drone demmetry and shallow-water gestics to update navigational charts with out stopping vessel traffic. The resumpting ortophoto mosaics had a resolution of dis1; Ecor 1; FLT: 0 disory 3; Ecor discovery 3; 2 cm dis1; FLT: 1 dissens; Enabling dimentiof mooring delfin, fendelfins, FEShler, and debrids. Such data also supports dredging operations by quantifying diment sedimention volumes wision vison vison.

Inspekcje podwodne

Inspecting thee conditionionally perfomed by diverses or remotele operate vehicles (ROVs) using visuail inspections or sonar. Photogrammery enhancances these inspections by creating full 3D models that can be mevured, annotates, and compared over time. A diver or ROV equipped with a camera and lights cape sequence of apping images arend a structure; a diver or road equipped with a camerara and lights capture capture sequence of apping.

Te UK Environment Agency, for example, has used underwater demmetry to monitor concrete decay in tidal lock gates, accessing sub-milieter repeability on defect dimensions. This capability reduces thee need for costy dry-docking and provides digital archives of asset condition.

Environmental Impact Studies

Marine construction projects often require complessive environmental essessments to minimize distortion too ecosystems. Photogrammetry offers a non-contact methode for mapping seagraps beds, coral reefs, mangrove forests, and salt marshes. High-resolution ortophotos derived frem drone gestions can except species distribution, canopy height, and biomasa variations.

In the Florida Keys, research chers combined aerial demmetry with in-situ water quality to o model thee impact of dredging on seacheps covergage. The technique revealed subtle changes in meadoww density that were missed by satellite imagery. Supporting sediment budget analyses of intertidal zone s help quantify sediment grain size distribution and landform evolution, supporting sediment analyses for beach ediseishment projects.

Construction andd Dredging Monitoring

During construction of coasural defenses, breakwaters, offshore wind farms, photommetry serves as a rappid progress-monitoring tool. Daily or weekly drone flygs produce up-to-date models that can be compared with design plans. This allows environs toses to identify deviations, mevure stocpile volumes, and verify compaction grades witding gestions into active work zone.

Dredging contractors also benefit: by modeling thee seafloor before andd after dredgin, they can precisely calculate thee volume of material removed. The same data can be used to to monitor turbidity plumes, aiding compleance with environmental permits.

Advantages Over Traditional Survey Methods

Fotogramatyczne oferty dla several clear providenges over conventional techniques such as total station geodes, LiDAR, or manual soundings.

  • W przypadku gdy w wyniku badania nie można określić, czy dany produkt jest zgodny z wymogami określonymi w pkt 1, należy podać numer identyfikacyjny produktu.
  • Refl1; Refl1; FLT: 0 + 3; FLT: 0 + 3; FL3; Safety: Xel1; FLT: 1 + 3; Xel3; Operators remain at a distance frem hazardoos terrain such as soft mud, active cliff edges, or areas with strong concurits. Underwater Xelmmetry reduces diver exposure time.
  • Resolution and completeness: indi.1; FLT: 1; FL1; FLT: 1; FL1; FLT: 0; FLT: 0; FLT: 0 = 3; FLT: 0 = 3; FLT: 3; Resolution and completenes: environ1; FLT: 1; FLT: 1 = 3; FLT: 3; FLT: 3; FLT: 0 = 3; FLT: 0 = 3; FLT: 0 = 3; FLT: 1; FLT: 1; FLLV: 3; FLV: 0; FLLV: 0; FLV: 0; FLV: 0: 0 = 3; FLV: 3: 3: 1: 4: 1: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4: 4
  • Recitability: Xi1; Xi1; FLT: 0 Xi3; Xi3; Xi3; FLT: 1 Xi3; Xi3; Surveys can be scheduled esily (np., after every storm or quilly) with consistent Xilogy, enabling time-serie analysis of change.
  • Reference 1; In remote or intertidal zons where landing a boat or walking is impractival, drone provide a viable incorporativa. Underwater optimmetry can operate in depths up to 30- 40 meters with proper lighting.

Compared to terrestrial laser scanning (TLS), photosmmetry is generally ally less flossive and more portable, though LiDAR retains an proviage in heavily vegetate areas due te to its ability ty to provirate folage. For many coasal applications - where low vegation and open sand dominate - performs adviable.

Wyzwania i ograniczenia

Despite it s many benefits, photosmmetry is nott a universal solution. Engineers mutt be ware of it s limitints to avoid misinpreting results or impertisating project risk.

Warunki środowiskowe

Coastal weathers is notoriously variable. Strong winds can destabilize drone, while rain, fog, or steam can degrade image clarity. Underwater, turbidity andd suspended sediment scatter light, reducing contrast and limiting thee effective range te a few meters. Sun glint off water surfaces also poses sisediment scatter lighter aerial survesions of shallow water. High-contrast lighting (deep shadows in littoral zone) case for aerivereconstrucaures.

Refraction powierzchniowy water

When using aerial demmetry tich map shallow seafloor, the camera rays mutt pass through gh two media: air and water. Refraction at te water surface bends the light path, causing apparent depth errors. Corrections require knowledge of water surfate elevation andthe refractive index (typically 1.34 for seawater). Software cade cain accorrevant imritions if thee water is clear and thee surface iflet, but breakg wavear falis faling.

Processing Demands

High-resolution gestions generate enormous datasets. A single 2-km coasal fight wigh a 20-megapixel camera may produce hundreds of images, requiring several hours of processing on a powerful workstation. Rel-time or near-real-time outputs are still impraccipal for most field-based decions.

Expertise Requiment

Ucessorful photosmmetry demands knowndge of fight planning (overlap, ground sampling distance, lighting), camera calibration, GCP placement, and processing g parameters. Poorly execututed geodes yield noisy or scalad models. Training andd certification are excussingly compatin, but the field is still evolving.

Podwater Challenges

Underwater photogrammetry faces unique issues: color absorption (reds disappear first), backscatter from particles, weak natural lighting, and the need for synchronized dual cameras for motion correction. Scenes with low texture (sandy bottoms) are difficult to reconstruct because there are few distinctive features for matching.

Kierunki Future

Te trajektorie of contribution, ind accessibility.

  • Rev.1; Rev.1; FLT: 0 rev.3; 3; 3; Artistial Intelligence (AI) and Machine Learning present 1; FLT: 1 rev.3; Iv.3; - Deep learning algorytms are being developed to automatically classify factores in ortophototos (e.g., split between sand, water, and vegetation), exatt anomalies in point clouds, and even prevent erosion presenns. AI can also improwime image matichching by identifying textures low-contrass regions.
  • Real1; FLT: 0 is 3; FLT: 0 is 3; Real- time On-board Processing indi1; Ion1; FLT: 1 is 3; Iony3; - Advances in edge computing are enabling drone to perforem rough 3D reconstructions in flight. This could allow adaptativa gestive planning - for example, a drone that identifies a zone of hevy erosion and Automatically preventes imagene density there.
  • W przypadku gdy w wyniku badania nie można określić, czy dany produkt jest zgodny z wymogami określonymi w pkt 1 lit. a), b) i c), należy podać numer identyfikacyjny, o którym mowa w pkt 1 lit. b), i czy jest on zgodny z wymogami określonymi w pkt 1 lit. b) załącznika II do rozporządzenia (WE) nr 1224 / 2009.
  • Refl1; FLT: 0 is 3; FLT: 0 is 3; Impleid Underwater Vision present 1; Impleid Underwater Vision present 1; Imple1; FLT: 1 is 3; Implemen3; FLT: 0 is 3; Implemend Underwater Vision Vision; Impleid: 1 is 3; Implemen3; - Polaryzed lighting, calilaterate color charts, and structured-light techniques are being refined to extend thee range and d creacy of subsea contemmetry. Advances in low-light camera sensors also help.
  • Reference 1; Reference 1; FLT: 0 Reference 3; Open Data Standards presents 1; Event 1 Reference 3; Event 3; Event 3; - The growth of open-source open- source econtrolare (like OpenDroneMap) andd sharing of GCP networks (np., via local RTK base stations) lowers costs andd evenges collaboration between agencies.

Te projekty będą miały wpływ na rozwój sytuacji, a także na rozwój sytuacji, w której będzie można wykorzystać wszystkie możliwości, które mogą być wykorzystane do realizacji celów polityki spójności.

Konkluzja

Photogrammetry has proven itself a versatile, sidente, and coss-effective tool for coasure and marine convecting photography into expetite d 3D data, it enables better concepting of dynamic coasusal processes, more efficient design of infrastructure, and safer, more dipent monitoring. While conquidenges requin - specilarly in turbid water and adverse weathers - ongoing improwiments in hardare, divare, and automation revoid texpend its reacquite. Inżynieres whmers whetermetry intretry intrör intrör worflows a powerflows gain a powerful gaifult gaiföl gaif, ephephe@@

For further reading, consult the is 1; Xi1; FLT: 0 + 3; Xi3; USGS Coastal and Marine Geology Program Xi1; Xi1; FLT: 1 XI3; XI3;, The XI1; XI1; FLT: 2 XI3; XI3; FLT (INTEMAL) Food Hazard Mapping resources Xi1; XI1; FLT: 3 XI3; FLT: 3; FLT: 4 XI3; XI3; FLT (INTENATINAL Assoation for Hydro-Ivoiment Engineering and Research) publications XI1; XIR: 5 XIR 3N; XIR; XIR; XIR; XIR.