Historical Contour Overlay in CAD
Budget: $30 – $250 AUD
I already have a fully drafted survey in AutoCAD (.dwg) and now need to enrich it with a set of historical contours that exist only on scanned maps supplied to me as JPEGs. Your task is to bring those contours into the current drawing, place them on their own layer, create a distinct linetype / layer index for easy toggling, and revise the drawing title block so it clearly states “Historical Contour Overlays”.
The JPEG scans are my only source but can provide web address as they are ARCGIS/Spatial Services information. I am not certain whether the originals carry a usable coordinate grid or fixed reference marks, so part of the assignment will be to assess each image, establish control (using whatever tie points the survey already provides), and geo-reference the contours accurately before tracing or vectorising them. Once the geometry sits correctly, add the new linetype I request for historic data and keep the layer naming consistent with the existing CAD standards in the file.
Deliverables:
• Updated .dwg with all historical contours correctly aligned on a dedicated layer using the new linetype. Include Final PDF in A3.
• Revised title block reflecting the added overlay. One small change to align retaining wall to boundary on western side
• Any world file / transformation notes you generate so that future edits remain repeatable.
I work in AutoCAD 2022, so please return something fully compatible. If you see a cleaner way to handle the coordinate uncertainty, outline it when you propose.
The JPEG scans are my only source but can provide web address as they are ARCGIS/Spatial Services information. I am not certain whether the originals carry a usable coordinate grid or fixed reference marks, so part of the assignment will be to assess each image, establish control (using whatever tie points the survey already provides), and geo-reference the contours accurately before tracing or vectorising them. Once the geometry sits correctly, add the new linetype I request for historic data and keep the layer naming consistent with the existing CAD standards in the file.
Deliverables:
• Updated .dwg with all historical contours correctly aligned on a dedicated layer using the new linetype. Include Final PDF in A3.
• Revised title block reflecting the added overlay. One small change to align retaining wall to boundary on western side
• Any world file / transformation notes you generate so that future edits remain repeatable.
I work in AutoCAD 2022, so please return something fully compatible. If you see a cleaner way to handle the coordinate uncertainty, outline it when you propose.