Boundary line
GTS benchmark is called Great trigometical survey benchmark. its position is decided by survey of India department. it RL is decided with reference to MEAN SEA LEVEL. no of benchmark, position and location is given in catalogue of survey of India department.
In the context of Civil Engineering, especially land surveying, Reduced Level "RL" refers to reducing (or equating) levels (elevations) to a common datum, which is either a real or imaginary location with a nominated elevation of zero. The most common convenient datum was mean sea level. On small surveys that require the collection of elevation data the datum can be assumed and for practical purposes it simply needs to be far enough below the survey area to avoid negative numbers, thus the starting point of a survey might be nominated to be RL 100.00
In land surveying, "inv" typically stands for "invert," referring to the lowest point or the bottom elevation of a conduit, such as a pipe or a drainage channel. It is crucial for determining the flow of water and ensuring proper drainage in construction and civil engineering projects. The invert elevation helps surveyors and engineers assess the feasibility and design of drainage systems.
Green concrete could mean two different things. It could mean that the concrete isn't cured yet, or it could mean that it is supposed to be environmentally friendly.
RCC
Survey spikes with orange ribbons typically indicate property boundaries or survey markers. These markers are often placed by surveyors to demarcate the limits of a parcel of land. It's important to respect these markers as they represent legal boundaries and should not be disturbed or removed without permission.
Land Surveyors use markers as reference points for topographic mapping. Companies such as NRG Surveys will install a series of markers and using specialist measuring equipment will measure the precise 3 dimensional cartesian coordinates of each marker with reference to a network. The network may be a local system where it is assumed the earth is flat for small surveys but for larger surveys a 'projection' is required to accomodate the curvature of the earth. Heights are commonly referred to in relation to the geoid, the equipotential surface of the earth which would coincide exactly with the mean ocean surface, if the oceans were in equilibrium, at rest, and extended through the continents.
Fire hydrant nearby.
PLS can stand for a variety of things depending on the context. It can mean "Please," "Partial Least Squares" in statistics, or "Public Land Survey."
Are you sure you don't mean ALTA survey? An ALTA survey is simply a type of survey with certain requirements that may be above and beyond the state's minimum requirements. An ALTA survey may be required by the title insurance company or the lender. ALTA stands for American Land Title Association.
markers
markers
I wonder, which map the question originator is looking at? On Ordnance Survey maps symbol guides, there is no RED STAR. There is however a blue star meaning: Other Tourist Feature.
It means "The markers."
markers
slip markers simply means moving your marker from one needle to the another one.
ERL in a survey plan typically stands for "Existing Rights and Liabilities." It is used to denote any existing legal rights or liabilities associated with a property that are relevant to the survey. These could include easements, covenants, or restrictions that may impact the use or development of the land.