Site base map (free, not a survey)
- Lot and parcel lines
- Building footprints
- Roads and driveways
- Contours and spot elevations
- Aerial underlay
- Coordinate system and units
Architects, landscape designers and students
Where is the site you're designing?
Free site base map for a lot: parcel lines, building footprints and LiDAR contours in one coordinate system, ready for CAD. Not a survey.
- Free to read
- No sign-up until the draft
- Hands off to the right door
ePlan fills in
- Parcel lines
- Building footprints
- Contours from LiDAR
- Aerial imagery
- Flood zone
How it works
Site base map, from one answer
- Enter the site address and pick the layers.
- ePlan assembles parcels, buildings and LiDAR contours in one coordinate system.
- Download the base free. Moving dirt? Start a grading and dust control plan.
What you get
Site base map and 1 more document
The check is free. The paperwork after it is drafted at the Grading and erosion control plan door.
Grading and dust control plan
- Disturbed area and cut and fill
- Erosion and sediment controls
- Dust control measures
- Schedule and inspections
From public data
What ePlan fills in, and from where
- Parcel linesRegrid nationwide parcel data (or the county assessor)
- Building footprintsMicrosoft US Building Footprints
- Contours and spot elevationsUSGS 3D Elevation Program
- Aerial imageryUSDA NAIP
- Flood zoneFEMA National Flood Hazard Layer (Map Service Center)
1 acre
of land disturbance is where federal construction stormwater permit coverage starts, including smaller lots in a larger plan
Source: 40 CFR 122.26(b)(15), eCFR
Ready for the paperwork?
Draft the erosion and sediment control plan, grading narrative and dust control plan your city or county wants with the grading permit. Free to read.
Questions
Site Base Map for CAD: what people ask
Is a base map from public data a survey?
No. In California, mapping the contour of the ground or locating property lines for others is land surveying under Business and Professions Code 8726. A public-data base map is for early design; permit drawings that need a survey need a licensed surveyor.
Which foot should my CAD file use?
The international foot, exactly 0.3048 meter. Since January 1, 2023, NIST says the U.S. survey foot should be avoided except for historic and legacy applications, which matters when you mix old state plane data with new.
When does site grading need a stormwater permit?
Federal rules cover clearing, grading and excavating that disturb one acre or more, including smaller lots that are part of a larger plan of development that will disturb an acre or more.
The rules this door follows
Related doors
Other projects people start from here
Contractors and owners · grading
Grading and erosion control plan
Where are you grading?
Contractors, designers and homeowners sizing site work
Site Calculators
What are you sizing?
Buyers, lenders and developers
Phase 1 ESA cost calculator
Which property are you buying or financing?
Plants that send process wastewater to the sewer
Slug Control Plan for Industrial Wastewater
Where does your plant discharge?
Employers keeping injury and illness records
OSHA 300 Log and 300A Summary
What does the establishment do?
Construction stormwater
SWPPP
Where is the construction site?
Site Base Map for CAD: check it free
Answer it and ePlan opens the Grading and erosion control plan door with your answer filled in.