The land is essentially flat

It is sort of flat, like an inclined plane.
say, would you like tickets to the flat earth banquet? Only $100 ea!

What seems to be the problem? You don't want to do the new work? Hey, pass it on to another surveyor. Everyone needs work lately.

@jt50

I see Bruce's point, half foot contours will result in a black page.

What are they building? The super hadron collider? It's just dirt.

He must be thinking of some other parcel. That one ain't flat.

@norman-oklahoma

client is a big picture guy, doesn't see all the ditches and swales.

Thought I was an expert on purely topographic surveys concerning elevations on agricultural land and got spanked in furrow fed truck farms where inches determine how the field reacts when given water, ditches and canals have to be within inches of proper grade, subdrain ditches and tiles have to be exactly right.?ÿ The farmers have wide heavy blades which they can tow behind a tractor to cut and fill a field to a grade of ?«" over acres and laser grading for ditches that are also good to ?«".?ÿ Doesn't matter where the boundary is, it's a precise drainage question and the owner having tilled the land for decades as a much better picture than some GPS button pusher with a Quad to run the field and a total station to hit the ditch inverts.

When the land is essentially flat and it matters I'll accede to the owner concerning topography and refuse to survey if litigation is involved.?ÿ They have the benefit of actually watching water flow over the land for years and no "elevation survey" will trump that.?ÿ Not the purview of land surveyors.

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@dave-karoly

If they are paying for additional work @ 0.5m contour interval then let them pay. 🙂

@jt50

half a foot, about 15cm.

Have fun explaining the cost of the field work to meet the accuracy standards of a half foot contour interval. 2007 survey looks to be photogrammetrically derived, useless for the current requirements.?ÿ

I detest computer generated topos with all of the pointy changes that don't exist in nature.

But, these days itƒ??s just a point cloud from drone lidar.

Isnƒ??t it??ÿ

There are many properties around here that would have many areas that eroded 1/2 foot or more since 2007.

Simply logging a place will change the topography radically in 5 years' time.