[{"data":1,"prerenderedAt":552},["ShallowReactive",2],{"\u002Fen\u002Fcas-usage\u002Fcadastral-survey":3,"related-\u002Fen\u002Fcas-usage\u002Fcadastral-survey":173},{"id":4,"title":5,"body":6,"description":149,"extension":150,"image":151,"manufacturer":151,"meta":152,"model":151,"navigation":159,"path":160,"publishedAt":161,"relatedDrones":162,"relatedServices":151,"seo":164,"specs":151,"stem":171,"__hash__":172},"content\u002Fen\u002Fcas-usage\u002Fcadastral-survey.md","Cadastral Survey and As-Built Plan by Drone",{"type":7,"value":8,"toc":133},"minimark",[9,13,18,23,26,30,33,37,40,44,47,51,54,77,80,84,115,119,122,126],[10,11,12],"p",{},"Precision topographic surveying is at the heart of many land and planning processes: land subdivision, as-built plans after construction, easement establishment, building permit applications. Photogrammetric drone surveying complements the land surveyor's work by producing an exhaustive terrain survey in a fraction of the time of a traditional total station survey, with an incomparable richness of data.",[14,15,17],"h2",{"id":16},"when-is-a-drone-survey-appropriate","When is a drone survey appropriate?",[19,20,22],"h3",{"id":21},"land-subdivision-and-boundary-marking","Land subdivision and boundary marking",[10,24,25],{},"Before a sale or subdivision of a property, the owner must have a land measurement document prepared by a chartered surveyor. The drone survey provides the complete topography of the parcel — contour lines, visible boundaries, existing structures — which forms the basis for the surveyor's area calculations and boundary marker positioning.",[19,27,29],{"id":28},"as-built-plans","As-built plans",[10,31,32],{},"An as-built plan is the document that certifies the conformity of completed works with the building permit drawings. It is mandatory for public buildings and required by certain private project owners. The drone produces an accurate survey of the entire parcel — buildings, roadways, visible networks, landscaping — in a single flight session.",[19,34,36],{"id":35},"land-studies-and-property-diagnoses","Land studies and property diagnoses",[10,38,39],{},"Before acquiring land for a construction or development project, the topographic survey assesses project feasibility: slopes, buildable areas, positioning relative to boundary setbacks and easements. The drone produces this survey quickly, with complete parcel coverage even on rough or wooded terrain.",[19,41,43],{"id":42},"municipal-assets-and-gis","Municipal assets and GIS",[10,45,46],{},"For local authorities wishing to update their geographic information system (GIS), the drone produces up-to-date orthophotos and large-scale digital terrain models, usable in GIS software (QGIS, ArcGIS) for municipal asset management and urban planning.",[14,48,50],{"id":49},"accuracy-and-deliverables","Accuracy and deliverables",[10,52,53],{},"Photogrammetric drone topographic surveys produce georeferenced data in the French legal projection systems (RGF93, Lambert 93) with the following accuracy levels:",[55,56,57,65,71],"ul",{},[58,59,60,64],"li",{},[61,62,63],"strong",{},"Orthophoto",": 3 to 5 cm\u002Fpixel resolution depending on flight altitude",[58,66,67,70],{},[61,68,69],{},"DTM",": altimetric accuracy of ±5 to 10 cm with control points",[58,72,73,76],{},[61,74,75],{},"Contour lines",": 20 to 50 cm equidistance depending on required precision",[10,78,79],{},"These deliverables are compatible with CAD and GIS software used by chartered surveyors, engineering consultancies and local authority technical departments.",[19,81,83],{"id":82},"what-we-deliver","What we deliver",[55,85,86,92,98,103,109],{},[58,87,88,91],{},[61,89,90],{},"Georeferenced orthophoto (GeoTIFF)"," in Lambert 93",[58,93,94,97],{},[61,95,96],{},"3D point cloud (LAS)"," with ground\u002Fvegetation\u002Fbuilding classification",[58,99,100],{},[61,101,102],{},"Digital terrain model (raster GeoTIFF)",[58,104,105,108],{},[61,106,107],{},"Topographic plan (DXF\u002FDWG)"," with contour lines, buildings and visible networks",[58,110,111,114],{},[61,112,113],{},"Accuracy report"," with control point description and deviation statistics",[14,116,118],{"id":117},"complementarity-with-chartered-surveyors","Complementarity with chartered surveyors",[10,120,121],{},"Drone surveys do not replace the chartered surveyor for regulatory acts (boundary marking, DMPC). They complement their work by providing an exhaustive topographic base that reduces total station survey time and enriches the file documentation. Many surveying firms now integrate drones into their workflows for large parcels or complex terrain.",[14,123,125],{"id":124},"our-field-approach","Our field approach",[10,127,128,129,132],{},"We use the ",[61,130,131],{},"DJI Matrice 4TD"," for precision topographic surveys, with RTK GPS ground control points to guarantee geodetic data quality. Missions are planned in agreement with chartered surveyors or project owners so that deliverables integrate directly into their workflows.",{"title":134,"searchDepth":135,"depth":135,"links":136},"",2,[137,144,147,148],{"id":16,"depth":135,"text":17,"children":138},[139,141,142,143],{"id":21,"depth":140,"text":22},3,{"id":28,"depth":140,"text":29},{"id":35,"depth":140,"text":36},{"id":42,"depth":140,"text":43},{"id":49,"depth":135,"text":50,"children":145},[146],{"id":82,"depth":140,"text":83},{"id":117,"depth":135,"text":118},{"id":124,"depth":135,"text":125},"Precision topographic surveys for cadastre, land subdivision, as-built plans and land studies — by drone with centimetric accuracy.","md",null,{"category":153,"categoryLabel":154,"tags":155,"service":158},"topographie","Topography & Mapping",[156,157],"construction","mapping","topography-mapping",true,"\u002Fen\u002Fcas-usage\u002Fcadastral-survey","2026-05-07",[163],"dji-matrice-4td",{"keywords":165,"title":5,"description":149},[166,167,168,169,170],"cadastral survey drone","as-built plan drone","topographic land survey drone","land subdivision drone","surveyor drone cadastre","en\u002Fcas-usage\u002Fcadastral-survey","oLacIsLwde4w8RyU2uuLo0BsTwveI7RXOLe23nBhJ94",[174,382],{"id":175,"title":176,"body":177,"description":368,"extension":150,"image":151,"manufacturer":151,"meta":369,"model":151,"navigation":159,"path":371,"publishedAt":161,"relatedDrones":372,"relatedServices":151,"seo":373,"specs":151,"stem":380,"__hash__":381},"content\u002Fen\u002Fcas-usage\u002Fconstruction-monitoring.md","Construction Site Monitoring by Drone",{"type":7,"value":178,"toc":360},[179,182,186,193,196,228,232,235,242,245,249,256,282,286,289,296,314,318,321,347,350,352,357],[10,180,181],{},"On a civil engineering site, decisions are made fast and often on incomplete information. Drones change the equation: they deliver a comprehensive, accurate and regular view of construction progress, from earthworks to handover. What once took a day of surveying to produce can now be generated in a few hours of processing after a 30-minute flight.",[14,183,185],{"id":184},"what-drones-bring-to-construction-site-monitoring","What drones bring to construction site monitoring",[10,187,188,189,192],{},"Construction site monitoring by drone relies on ",[61,190,191],{},"photogrammetry",": the drone captures thousands of photographs from multiple angles, which are then assembled by software to produce precise three-dimensional data. The output is a complete digital model of the site, updated as frequently as needed.",[10,194,195],{},"This data serves multiple uses simultaneously:",[55,197,198,204,210,216,222],{},[58,199,200,203],{},[61,201,202],{},"Cut and fill volume calculation"," — earthwork progress tracking with decimetre-level accuracy",[58,205,206,209],{},[61,207,208],{},"Digital Terrain Model (DTM)"," — ground-state record before, during and after works",[58,211,212,215],{},[61,213,214],{},"Orthophotography"," — georeferenced aerial imagery usable as a base map",[58,217,218,221],{},[61,219,220],{},"3D point cloud"," — importable into BIM software (Revit, AutoCAD Civil 3D, Pix4D)",[58,223,224,227],{},[61,225,226],{},"Progress photography"," — dated records for the site diary and owner relations",[14,229,231],{"id":230},"use-case-earthworks-and-volume-calculation","Use case: earthworks and volume calculation",[10,233,234],{},"Volume calculation for earthworks is one of the most economically significant drone applications on construction sites. Traditionally done by total station survey — time-consuming and expensive — it can be automated by drone with equivalent accuracy.",[10,236,237,238,241],{},"The principle: a photogrammetric survey before earthworks establishes the ",[61,239,240],{},"baseline terrain model"," (zero state). Each subsequent survey automatically calculates excavated or moved volumes, zone by zone. In the event of a dispute with the earthworks contractor over quantities, the 3D model provides objective evidence.",[10,243,244],{},"For large-scale projects (roads, motorway embankments, logistics parks), regular drone surveys — weekly or biweekly — enable contractual tracking of moved volumes and accurate billing.",[14,246,248],{"id":247},"progress-documentation-and-interface-management","Progress documentation and interface management",[10,250,251,252,255],{},"Beyond volumes, the drone delivers ",[61,253,254],{},"objective photographic documentation"," of every construction phase. This traceability is valuable for:",[55,257,258,264,270,276],{},[58,259,260,263],{},[61,261,262],{},"Site meetings"," — georeferenced orthophotos replace sketches and partial surveys",[58,265,266,269],{},[61,267,268],{},"Contractual relations"," — in the event of a dispute about site condition at a given date, dated flight archives provide irrefutable evidence",[58,271,272,275],{},[61,273,274],{},"Interface management"," — visual tracking of successive work packages, rapid identification of delayed zones",[58,277,278,281],{},[61,279,280],{},"Communication"," — aerial imagery for investor or local authority progress reports",[14,283,285],{"id":284},"bim-integration-and-digital-deliverables","BIM integration and digital deliverables",[10,287,288],{},"Drone-produced data is directly compatible with BIM (Building Information Modelling) workflows. The 3D point cloud and mesh model can be imported into digital twin software to compare as-built conditions against design intent.",[10,290,291,292,295],{},"This comparison — ",[61,293,294],{},"as-built vs. as-designed"," — detects geometric deviations in real time, before they become costly non-conformances. A building constructed a few centimetres off its intended footprint is easily corrected during the shell phase; the same defect discovered during fit-out may require complete remediation.",[10,297,298,299,302,303,302,306,309,310,313],{},"We deliver data in industry-standard formats: ",[61,300,301],{},"LAS\u002FLAZ point cloud",", ",[61,304,305],{},"GeoTIFF orthophoto",[61,307,308],{},"raster DTM",", and a ",[61,311,312],{},"precision report"," with geodetic control points.",[14,315,317],{"id":316},"survey-frequency-and-campaign-planning","Survey frequency and campaign planning",[10,319,320],{},"The value of drone-based monitoring depends on survey regularity. Depending on the nature of the project:",[55,322,323,329,335,341],{},[58,324,325,328],{},[61,326,327],{},"Weekly survey"," — for active earthworks with volume-based billing",[58,330,331,334],{},[61,332,333],{},"Biweekly survey"," — for building or road projects during the shell phase",[58,336,337,340],{},[61,338,339],{},"Monthly survey"," — for long-duration projects during fit-out or finishing",[58,342,343,346],{},[61,344,345],{},"Ad hoc survey"," — before handover, after an incident, in the event of a site-condition dispute",[10,348,349],{},"Each survey campaign generates a standardised progress report, delivered within 48 to 72 hours.",[14,351,125],{"id":124},[10,353,128,354,356],{},[61,355,131],{}," for construction monitoring missions in photogrammetric configuration. Its high-resolution sensors and stability in moderate wind conditions ensure consistent image quality from survey to survey.",[10,358,359],{},"Our operators are proficient in photogrammetric processing software (Pix4D, DroneDeploy) and the complete digital delivery chain. We offer regular monitoring subscriptions tailored to your project duration, with a shared progress dashboard.",{"title":134,"searchDepth":135,"depth":135,"links":361},[362,363,364,365,366,367],{"id":184,"depth":135,"text":185},{"id":230,"depth":135,"text":231},{"id":247,"depth":135,"text":248},{"id":284,"depth":135,"text":285},{"id":316,"depth":135,"text":317},{"id":124,"depth":135,"text":125},"Regular topographic surveys, earthwork volume calculations, 3D modelling and progress documentation for your construction and civil engineering projects.",{"category":153,"categoryLabel":154,"tags":370,"service":158},[156,157],"\u002Fen\u002Fcas-usage\u002Fconstruction-monitoring",[163],{"keywords":374,"title":176,"description":368},[375,376,377,378,379],"drone construction monitoring","topographic survey construction drone","earthwork volume calculation drone","3D modelling construction","photogrammetry construction drone","en\u002Fcas-usage\u002Fconstruction-monitoring","5esdHAT2DTuMdVCw7q9D0JHdBUWx8XxR6-wWMD7zFLU",{"id":383,"title":384,"body":385,"description":537,"extension":150,"image":151,"manufacturer":151,"meta":538,"model":151,"navigation":159,"path":541,"publishedAt":161,"relatedDrones":542,"relatedServices":151,"seo":543,"specs":151,"stem":550,"__hash__":551},"content\u002Fen\u002Fcas-usage\u002Fquarry-3d-modelling.md","Quarry 3D Modelling and Volume Calculation by Drone",{"type":7,"value":386,"toc":526},[387,390,394,398,401,412,416,419,423,426,430,437,440,460,463,467,470,507,511,518,520],[10,388,389],{},"The extractive industry — aggregate quarries, limestone, sandstone, open-pit mines — needs precise knowledge of its volumes: extracted volumes, stockpile volumes, remaining volumes to be exploited. These volume calculations have traditionally been carried out by surveyors with total stations — a slow, costly and sometimes hazardous operation on active working faces. Photogrammetric drone surveys are transforming this process: in a few hours of flight, an entire quarry is modelled in 3D with decimetre precision.",[14,391,393],{"id":392},"volume-requirements-in-the-extractive-industry","Volume requirements in the extractive industry",[19,395,397],{"id":396},"monitoring-extraction-progress","Monitoring extraction progress",[10,399,400],{},"A quarry operator must regularly track the progress of working faces to:",[55,402,403,406,409],{},[58,404,405],{},"Verify that extraction conforms to the approved operating plan",[58,407,408],{},"Calculate extracted tonnages for billing and materials accounting",[58,410,411],{},"Anticipate extraction requirements based on commercial demand",[19,413,415],{"id":414},"stockpile-management","Stockpile management",[10,417,418],{},"Aggregate stockpiles, run-of-mine materials or processed product stockpiles represent significant financial assets. Their accounting valuation requires regular volumetric inventory. With a drone, an entire quarry's stockpiles are inventoried in half a day, with a precision of ±2 to 5% on volumes.",[19,420,422],{"id":421},"studies-and-regulatory-filings","Studies and regulatory filings",[10,424,425],{},"A quarry operating authorisation application (Water Act file, impact assessment) requires an accurate topographic survey of both the initial state and the planned final state. These studies are carried out by expert surveyors, but the drone can produce the baseline topographic survey in a fraction of the time and cost.",[14,427,429],{"id":428},"precision-and-methodology","Precision and methodology",[10,431,432,433,436],{},"Drone photogrammetry produces a ",[61,434,435],{},"dense 3D point cloud"," whose precision depends on image resolution, flight altitude and the number of ground control points (GCPs).",[10,438,439],{},"For quarries, standard precision is:",[55,441,442,448,454],{},[58,443,444,447],{},[61,445,446],{},"Planimetry"," (X, Y): ±3 to 5 cm with GCPs",[58,449,450,453],{},[61,451,452],{},"Altimetry"," (Z): ±5 to 8 cm with GCPs",[58,455,456,459],{},[61,457,458],{},"Volumes",": ±2 to 5% depending on stockpile shape and terrain complexity",[10,461,462],{},"This precision is sufficient for commercial volume calculations and regulatory filings, and is comparable to that of a traditional total station survey.",[14,464,466],{"id":465},"deliverables","Deliverables",[10,468,469],{},"From a quarry photogrammetric flight, we produce:",[55,471,472,478,483,489,495,501],{},[58,473,474,477],{},[61,475,476],{},"3D point cloud (LAS\u002FLAZ)"," — importable into AutoCAD Civil 3D, Revit, Leica Infinity, Trimble Business Center",[58,479,480,482],{},[61,481,208],{}," — ground surface without vegetation or structures",[58,484,485,488],{},[61,486,487],{},"Digital Surface Model (DSM)"," — overall surface including stockpiles and equipment",[58,490,491,494],{},[61,492,493],{},"High-resolution orthophoto"," — georeferenced aerial view usable as a GIS base map",[58,496,497,500],{},[61,498,499],{},"Volume calculation report"," — by defined zone, with comparison against a previous reference state",[58,502,503,506],{},[61,504,505],{},"Cross-sections and profiles"," — transverse and longitudinal sections of working faces",[14,508,510],{"id":509},"frequency-and-monitoring","Frequency and monitoring",[10,512,513,514,517],{},"For operators wanting continuous monitoring, we offer ",[61,515,516],{},"monthly or quarterly"," survey campaigns, with an online volume evolution dashboard. This regularity allows precise tracking of extraction rates and anticipation of operating authorisation renewals.",[14,519,125],{"id":124},[10,521,522,523,525],{},"The ",[61,524,131],{}," is our platform of choice for quarry surveys, for its stability in moderate wind and its ability to operate in dusty environments. Our operators deploy geodetic control points (GCPs) with RTK differential GPS to guarantee the planimetric and altimetric precision of each survey.",{"title":134,"searchDepth":135,"depth":135,"links":527},[528,533,534,535,536],{"id":392,"depth":135,"text":393,"children":529},[530,531,532],{"id":396,"depth":140,"text":397},{"id":414,"depth":140,"text":415},{"id":421,"depth":140,"text":422},{"id":428,"depth":135,"text":429},{"id":465,"depth":135,"text":466},{"id":509,"depth":135,"text":510},{"id":124,"depth":135,"text":125},"Topographic surveys of quarries, stockpile and excavation volume calculations, accurate 3D models for the extractive industry — by photogrammetric drone.",{"category":153,"categoryLabel":154,"tags":539,"service":158},[540,156],"industry","\u002Fen\u002Fcas-usage\u002Fquarry-3d-modelling",[163],{"keywords":544,"title":384,"description":537},[545,546,547,548,549],"quarry volume calculation drone","quarry topographic survey","quarry 3D modelling drone","aggregate stockpile drone photogrammetry","quarry cubature drone","en\u002Fcas-usage\u002Fquarry-3d-modelling","nkcmLg4kRjgB4wvWeX4gLEIWhEVhNtlRg76c11WbHwg",1780308667645]