Mapping and surveying
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Files a land surveyor delivers: DWG, GML, PDF and more
What each file you receive after a topographic survey is, what it is for and who uses it: points in TXT or CSV, plans in DWG or DXF, SHP, GML, IVGA, ICUC and PDF.
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Shadow and slope analysis before you design
How we calculate the shadow cast by terrain, buildings and trees at each hour and season, and how a slope map shows where you can build on a plot.
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Drainage networks: why point density changes the result
How the drainage network of a hillside is calculated from the terrain model, and what changes from 0.5 to 5 points per m², with an example in Xàbia (Jávea).
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Why a 3D model: the digital twin of a historic façade
Photogrammetry with a metric camera and classical land surveying to obtain the 3D model and the plan of a historic façade before designing its restoration.
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Vegetation volume with LiDAR: how many lorries are needed
How a drone and LiDAR gave the vegetation volume of a 10,113 m² plot in Xàbia (Jávea) before development, and how many lorries it would take to clear.
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Viewshed analysis: what can be seen from a point
What a viewshed is, how it is calculated with a terrain model and what it is used for on the coast: landscape integration, siting a house or anticipating its views.
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Orthophoto, DTM, DEM and contour lines explained
What makes an orthophoto different from an aerial photo, a DTM from a DSM, and what contour lines are for, with a large hillside site in Xàbia (Jávea).
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3D modelling of a warehouse: optimising storage space
Clotoides uses 3D modelling to model your warehouse so that you can optimise its space and maximise performance.
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3D terrain modelling with digital terrain models
3D terrain modelling helps optimise the territory, reduce costs and maximise returns. Ask Clotoides, land surveyors in Xàtiva and Xàbia, for advice.
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Structural monitoring: what it is and what it is for
Structural monitoring (auscultación) by Clotoides land surveyors detects deformation, movement and cracking in a construction before it is too late.
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Urban planning compatibility certificate: how to get it
We help you with the urban planning compatibility certificate (certificado de compatibilidad urbanística) that town councils require for an opening licence.
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Survey coordinates: UTM, ETRS89 and geographic
What UTM and geographic coordinates are, what zone 30 and ETRS89 mean, how to convert between them and when the Cadastre asks for them. With an example near Xàtiva.
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Responsible declaration for building works in Spain
Planning renovations? We help you obtain the responsible declaration for building works (declaración responsable de obra) by certifying the buildings on your plot.
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Construction control and volume calculation
At Clotoides we specialise in construction control: volume calculations and monitoring surveys to track each stage of the works and justify monthly certifications.
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Landfill surveying: better landfill management
Landfill monitoring and management rely on topographic surveys to control the volume of waste deposited, from the design phase to the final sealing of the site.
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Land expropriation in Spain: how a surveyor checks it
Our surveying services help to verify that the expropriation of a property has been carried out correctly, with a report that has evidential value.
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Georeferenced plan: what it is and when it is required
What a georeferenced plan is, when the Cadastre or the Land Registry ask for one, what it contains and what documents the surveyor needs. A guide before you hire.
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Expert surveying report: what it is and who does it
Clotoides is a technical office experienced in expert surveying reports (peritación topográfica), using the latest technology to carry out the work.
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Cartography in Spain: from ED50 to ETRS89
Cartography in Spain: how mapping has evolved from the ED50 reference system to ETRS89, and why Clotoides transforms maps to meet Spanish and European rules.
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Topography in agriculture: land surveying in farming
Topography in modern agriculture helps farmers understand the land and design efficient cropping systems: irrigation, crop selection, terraces and fertiliser.
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Topography for architecture: point clouds and BIM
Clotoides uses advanced surveying techniques for architecture, making a difference and maximising a project's chances of success: 3D point clouds, modelling and BIM.
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Topography in construction: how terrain shapes a project
With a survey and a digital terrain model you can plan construction on solid data. Foundations, structure, drainage and landscaping all depend on the terrain.
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Garden design and topography: why the terrain matters
Clotoides helps you obtain the topography of your land as the basis for garden design. Slopes, sun exposure, drainage and accessibility all depend on the terrain.
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Landscape integration study: the territorial analysis
We use advanced techniques for collecting and processing territorial information to prepare the analysis behind a landscape integration study.
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How to choose a land surveying company: what to look for
How to choose a land surveying company: Clotoides explains what to consider, from equipment and services to prices, customer service, licences and insurance.
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Topographic survey for construction: why it matters
A topographic survey fixes the base of a building or structure with precision. Plan, assess risks, meet legal requirements and avoid unnecessary extra costs.
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Certificate of completion of works: why it matters
Certificate of completion of works (certificado final de obra): how a topographic survey by Clotoides helps you complete the paperwork for a new build.
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Fencing your plot: why a boundary survey should come first
Clotoides helps you determine the boundary of your land so that you can fence your plot with the certainty of doing it precisely and respecting the property limits.
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Topographic data sources: imagery, orthophotos, open data
An overview of the main sources of geopositioning and topographic data: satellite imagery, orthophotos, spatial data infrastructures and open data.
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GML file for the Cadastre: what it is and how it works
What a GML file is, why the Cadastre asks for it, what it contains, in which formats a surveyor delivers it and which programs open it.
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Land surveying tools: software and file formats
Topographic surveys, plot measurement and setting out on site require a command of a set of land surveying tools: CAD, GIS and file formats such as CSV and GML.
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Surveying equipment: total station, GNSS and drone
Which instruments a surveyor uses: total station, GNSS RTK, level, drone and LiDAR. What each one measures and when it is used on a real job.
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Land surveyor in Xàtiva: what is measured in la Costera
Land surveying in Xàtiva: what we measure in la Costera to define boundaries, areas and the exact position of buildings.
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Georeferenced plot measurement: an introduction
What georeferenced plot measurement is, what it is for in procedures with the authorities and which topics this land surveying blog covers.
Tell us about your case
Do you have a similar case?
Tell us about it with the cadastral reference. We will look at it, tell you what work is needed and prepare a quote.
- Xàtiva
- C/ Ballesters Navarresos, 7 · 46800 Xàtiva
- Xàbia
- C/ Ausiàs March, 2 · 03730 Xàbia
- or write to
- hola@clotoides.com