Questions tagged [land-survey]

The measurement of landscape features and their positions.

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16 views

How to export QGIS Contours to be compatible with 12D Software

I have processed my aerial drone survey images with Ground Control Points using AgiSoft. My accuracy and results were good. I have exported the DEM into QGIS and generated the Contours with labels etc....
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1answer
25 views

What do the acronyms OBT and OCIP mean on a survey plan?

When looking at survey plans for British Columbia, Canada, there are various acronyms used to describe survey markers. Ones that I do know include: BT - bearing tree CIP - capped iron post PP - "...
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32 views

Transforming Cassini coordinates to UTM

Why is it that when I transform certain Cassini coordinates to UTM, they give negative UTM coordinates, which should not be the case. Note that the equator passes through this particular area of ...
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1answer
68 views

Adding a land survey to QGIS Canvas

I'm having difficulty adding land survey information to QGIS. What I need to do is add the survey boundaries of oil and gas leases, so that I can overlay additional data associated with land ...
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22 views

Azimuth and distance plugin resultant shape at wrong dimension

I set my layer projections to NAD83 [4269] to draw surveyor results across a parcel in the US. Define the starting point using decimal degrees. Under Options I selected "Bearing" and under Distance ...
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66 views

Getting the latitude and longitude coordinates (to plot 2D) from a well survey

I basically want to do what you did here How to create a layer of directional/horizontal wells?. I am able to get the coordinates from a well survey to create a shapefile to be able to visualize the ...
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37 views

Shifting points along normal vector to path

I have list of points which are connected with line in "zig-zag" fashion: Using QGIS, I'm trying to create a line connecting all the middle or inside points and then shift all outside points to this ...
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2answers
130 views

Cheap relative positioning

I have a 6 acre permaculture farm, and I would like to be able to plant something at a location, log the location, and be able to find it again to within about a foot accuracy. I do not need the ...
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86 views

Recreate a Local Custom Coordinate System from Survey Data in GIS?

I have a .DWG file of a series of survey points that has no associated projection file with it. The surveying group I received the data from states that the system they use is a local coordinate ...
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1answer
250 views

Can QField record GPS Z-Value

We are a land survey company and are considering using QField to perform asset surveys for local government agencies. Looking through the documentation it appears that QField can do most of what we ...
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1answer
43 views

Seeking list of geodetic benchmark locations for all of Canada? [duplicate]

Does anyone know where I can find a list of geodetic benchmark locations for all of Canada? I am looking for a few specific control monuments in Arctic Canada with accurate coordinates
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100 views

What does “CLEAR” mean on a land survey map?

I paid for a land survey of my house lot, and there was one term on the survey map that I wasn't 100% sure about: "CLEAR". It's used on the map to refer to a short distance (e.g. 0.1' CLEAR or 0.2' ...
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37 views

Seeking method for determining survey points?

I'm trying to write software to create a topographic map, my goal is to select several points of interest and create a minimal mapping that is inclusive of the points and interpolates the topography. ...
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30 views

Details on Topcon theodolite data format (<3595959+3595959+****d094)

I am interfacing to a Topcon DT-102 (circa 1995) digital theodolite and wonder if anyone can help with the transmission format. It is perhaps shared with Sokkia or Leica/Wild. Background The unit ...
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48 views

Distance calibration between GNSS RTK receiver and display/processing device?

Are there any known procedures for calibrating a precise position of an external processing/display device (e.g. a smartphone or a tablet) relative to the GNSS receiver? Apparently, such a procedure ...
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1answer
87 views

Difference between a GNSS receiver and GNSS antenna

I´m relative new using GNSS data and I would like to understand a little more about the instruments that I´m planning to use in my future research. I was looking information on the UNAVCO website ...
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1answer
39 views

Mapping & digitizing geographic features freehand? [closed]

I´m working on a project to map a colleague´s farm, and then ultimately digitizing that information to produce maps and signage. To start, we´re focusing on a small agroforestry plantation. We want ...
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111 views

WPF: How to change the Map Point coordinate(lat/long) to screen point (x-y) on ArcGIS

My project required me to perform a close traverse to plotting by placing a marker on that particular point. My problem now is that the traverse calculation are in x-y plane, but to plot a point using ...
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1answer
478 views

Open Traverse Method for the map survey

I need to use traverse method in my program on visual studio(WPF) so that the user can get their target point coordinate by using their initial data. In my knowledge there is two type of traverse that ...
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1answer
181 views

Understanding CadNSDI versus GCDB PLSS datasets difference and accuracy?

I recently submitted some coordinates I acquired via ArcGIS to the BLM to go out into the field and pinpoint some locations. When I did the work at the computer I used ArcGIS and leveraged the BLM's ...
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2answers
3k views

Understanding the MUSYM field on SSURGO dataset?

What does the MUSYM field on the SSURGO data set mean? I have looked on the nrcs website have only found that it identifies soil. In the data set that I am looking at there are values like Ub and ...
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299 views

Adding land survey info to QGIS?

I am looking for help digitizing or adding info from survey plans into QGIS. In this example I'm trying to add the lease boundaries highlighted in yellow and the pipeline right of ways to the right ...
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37 views

Geolocating dataset of well pumps?

I have a dataset of well pumps, and I am trying to geolocate them. Each of the wells has as "Service Address" field, but instead of giving an address, it lists something that looks like this: "NW NE ...
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1answer
99 views

Hardware for Surveying and mapping total station

Is "Microsoft Windows CE 6.0 / Magnet Field" operating system the sole property of TOPCON total station or it can be found in other total stations as well?
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3answers
3k views

Why can't lines plotted on google maps suffice for legal determination of property boundaries?

If there is a way to calculate a maximum error in a line plotted on google maps (road map, or satellite view) , then that should be admissible in a court of law, shouldn't it ? For example, my deed ...
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1answer
485 views

How to map using more 'accurate' DATUM than WGS84? [closed]

WGS 84 is not very accurate as it is a compromise for the whole earth. Assuming theoretically I'm surveying using very accurate IMU and very accurate GPS (in WGS 84 of course). I think I'll get a ...
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1answer
581 views

DGPS post-processed Kinematic (PPK)

I did a dGPS survey last summer. Unfortunately, we didn't have a base station. So I did my survey in post-processed Kinematic PPK mode. Because we borrowed the equipment, we don't have access to post-...
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92 views

How to understand degrees in real estate

We are wanting to understand where the easement is on a 10 acre property we purchased. We don't really understand about tags for posting. This is the description: Ingress-egress easement for road ...
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1answer
115 views

Create Pseudo Drilling Spacing Units - Polygon inside another polygon from its boundaries

I am trying to create pseudo Drilling Spacing Units. That corresponded with the section, township and range that they are generated from. I am working with Sections from the Land grid in Oklahoma; ...
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1answer
474 views

Latitude and longitude information of agricultural land [closed]

Is there a method by which I can get latlong details of agricultural land? Latlong information of 1 point in the land is not useful, as I want details of the entire agriculture boundary (from latlong ...
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1answer
683 views

How to show slope directon and angle [duplicate]

I need to create a map showing slope direction and dip angles in QGIS. How do I get either: the dip angle to show up next to the direction arrow or the dip arrow symbol to change depending on the ...
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84 views

Align approximately colocated vector points for comparison

I have a more general, methodological question and do not have much knowledge about GIS techniques. I have 6 topographic survey ([x,y,z] point clouds), each representing the same dune/beach system ...
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1answer
4k views

Convert Cassini-Soldner Projection coordinates from Kenya to UTM

I have a list of coordinates from Kenya. The coordinates were recorded in old survey maps using Cassini-Soldner Projection, with Clarke 1858 Datum. The approximate geographic coordinates (WGS84) of ...
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2answers
559 views

How do you delete Survey123 attachments from a survey?

There seems to be no documentation on how to delete Survey123 attachments. Is it actually feasible? Is deleting the complete feature layer record required/necessary? (and if so, how can one be sure ...
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124 views

Adding surveyed points to ArcMap?

I am using arcmap 10.2. How do i insert survey points that were collected in PNEZD format?
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387 views

Validation points for supervise classification

I have undertaken supervised classification (maximum likelihood) and planning to survey the ground to validate the output. How many validation points do I need to take? The raster is a landsat tile ...
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2answers
332 views

American FactFinder by ZIP code

I'm doing a research project that involves using demographic data collected from both the national Census and the American Community Surveys. I am interested in about 40 zip codes within NYC. The ...
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1answer
81 views

Are all remote sensing landcover/use classifications without ground survey scientifically invalid? [closed]

It is on the need of accuracy assessment of classification product. Land cover/use classification is a prominent analysis in remote sensing. Now the question is if I generate a landcover from LANDSAT,...
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860 views

Using PLSS or BLM Boundaries in Oklahoma?

In Oklahoma should i be using the PLSS or BLM Boundaries I am struggling with: Which Surveying system to use in ArcGIS. The PLSS (Public Land Survey System) or the BLM (Bureau of Land Management) ...
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1answer
76 views

Establishing DGPS Connection With Old Equipment?

I am trying to do a differential surveying project with some outdated equipment, specifically: -An old AllegroCX personal handheld computer (Win 4.1) with SurvCE loaded on it to collect data and ...
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1answer
486 views

Using GIS to determine Average Land Distance From Equator?

How far away is the average piece of land on Earth from the equator? Put more precisely, what is the median absolute value of the latitude of landmass on Earth? From spherical geometry, the median ...
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28 views

Import polygon shapefile with SPCC Sections [closed]

I have a data set with records containing Township, Range and Section information but no X,Y coordinates. I would like to bring in the data to ArcGIS with each section as a polygon or a x,y point in ...
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1answer
355 views

Exporting Images Linked with Survey data, from a GPS to GIS format

We were setting up a workflow system, wherein we attach Survey images to our collected point data (Leica GPS). The same can be viewed in Software like Leica Geo office, but a GIS export of the files (...
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1answer
180 views

Why are heights given at various points on roads?

In the OS 1:25000 map below I have circled some numbers next to roads. The key says "Ground survey height" and there is another entry (in brown) for "Air survey height", but since all the data in the ...
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1answer
816 views

Can't generate true orthophoto from my software

I am a GIS specialist and a surveyor. Lately I'm trying to use as a surveying tool my DJI Phantom 3 pro combining with different software for generating DEM, DSM, 3d model and orthophoto. But I can't ...
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1answer
685 views

Bearing to X,Y, Z

I’m working on a small project where I’m testing the ability of a laser to accurately measure the angle of a wire. My control for the experiment gives me X,Y,Z coordinates for a point on the wire and ...
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4answers
1k views

Reaching cm (inch) level elevation precision using drones

A road construction firm needs altitude data of road path before and after the construction and the error should be less than 3 cm (2 inch). Normally, they put a ground station and workers manually ...
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1answer
44 views

What do the columns in this GIS file mean? Are they distances to 3 reference points?

I was handed this file and expected to know what to do with it. Does it possibly mean that point 1 is ~6539 ft from some marker and ~11370 from another marker? Are these types of file usually in ...
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1answer
917 views

How to Decipher an SDR File

I want to create a custom import routine that can read/import an sdr file. The sdr files will contain information the surveyor has picked up when completing an as-built. The data will likely contain ...
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1answer
106k views

Locating property corners using plat map description?

I am interested in a piece of property for which I have a plat map description, giving what seem to be latitudes/longitudes of lines along the boundaries (not sure about this). The objective is to ...