TopoAssist

Survey • Surface • Profile

Survey data

Import survey / GIS dataDrop files here or click to browse CSV · TXT · KML/KMZ · GPX · SHP · GeoJSON

Interactive: up to 5,000 points · DXF-only: 5,001–100,000 points

Coordinate mode CRS label

Longitude/latitude CSV columns such as Lon/Lng/Longitude and Lat/Latitude are supported. WGS84 data are automatically projected to a local metre grid for TIN, contour, distance and area calculations, while original geographic coordinates are restored for KML/KMZ/GPX export.

No data loaded

Export outputsDXF · GIS · LandXML · colour vector PDF

CAD

AutoCAD DXFContours, points and optional TIN faces

Include TIN as 3DFACE

GIS

GIS packageChoose format and visible data layers

GE points GE contours GE desc lines GE manual lines

XML

LandXML surfaceCivil 3D TIN, faces and breaklines

Surface name Units

PDF

Colour vector print sheetsHigh-quality plan, 3D and profile sheets

2D planTopographic plan 3D viewSurface perspective ProfileLongitudinal profile

Full colourExact CAD and surface colours Output quality Page setup

Vector lines and text remain sharp at large sizes. For the best physical print, enable “Background graphics” in the browser print dialog.

Optional company title block

LOGOCompany logo Company Project Project No. Client Prepared by

Files never leave this browser.

Description styles

Up to 20 description codes are detected from the imported file. Each code can use its own point symbol and AutoCAD point color. Connected lines use four primary AutoCAD colors plus black, with an exact ACI number available for advanced CAD standards.

Connect same-description points as polylines

Polyline connection uses imported point order and starts a new line when the description changes. Turn on Ln, then choose the line color from the palette or enter any AutoCAD Color Index (1–255).

Import survey data to detect description codes.

Topographic preview

Metric · m

Load survey points to begin.

Major Minor Point

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Survey surface workspace

Import CSV/TXT, GeoJSON, KML, GPX or Shapefile survey data to begin.

X — Y —

↗Live profile areaUse the profile icon, draw an alignment in 2D or directly on the 3D surface, then finish the line. The graph updates automatically.

Station	Elevation	Grade	X	Y
No profile generated.

Topographic preview

Large dataset - conversion mode

Survey surface workspace

Longitudinal Profile