Questions tagged [land-survey]

The measurement of landscape features and their positions.

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19 views

Tems Investigation and Garmin GPS 18x

I am new to Tems Investigation. I am using Garmin 18x as GPS Receiver, but it is not working. I already installed USBDrivers_2310 for my Garmin 18x. Does Tems Investigation supports Garmin 18x GPS ...
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22 views

How to create a roadway using a topo values shapefile (survey points data) in Sketchup Pro?

I am a GIS Technician, new to Sketchup, I would like to know how to create a roadway in Sketchup Pro using a shapefile which is a survey points data with elevations in meters. The topographic data is ...
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23 views

Bearing convergence in digitizing property surveys

I'm digitizing and stitching together a number of adjacent/overlapping property surveys. The most recent ones provide clear UTM/MTM grid bearings and distances, and in some cases coordinates of ORPs, ...
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38 views

Export DEM as point cloud in LAS format

I have a huge Digital Elevation Model in AutoCAD Civil 3D. I used the NNI smoothing method on the DEM (with 0.2 meters raster). I want to export the surface data as a point cloud in the LAS format. ...
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15 views

Spheroid Flattening Impact on Elevation

I am importing points containing elevation from a survey controller into a GIS. The survey template on the controller contains a projection using a HT2 Geoid model, in NAD 83 Canada UTM. I can match ...
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150 views

QGIS transformation local coordinate system to UTM35

I am creating a geo database for an archaeological excavation. We want to put data from a local system and from UTM35 in the same QGIS-project. I have Ground Control Points and I calculated ...
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1answer
733 views

Locating land title technical description on Google Maps

I am planning to buy a certain property but I'm too far away from where it's located to check it personally. The seller sends me a technical description of the property and I'm trying to locate it on ...
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24 views

How to enter survey coordinates into parcel fabric traverse grid?

I have a survey that only gives me the coordinate points for a parcel I need to draw into the parcel fabric. I am used to seeing bearings and distances - how do I take these coordinate points and turn ...
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17 views

Area measurement validation: ellipsoid vs geoid

I try to validate area measurements on orthomosaics using objects of known size on the ground. I'm working on centimeter level measurements. As far as i understand an orthomosaic in WGS 84 is ...
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47 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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59 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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128 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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180 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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78 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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47 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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167 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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93 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
678 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
61 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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290 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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40 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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32 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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65 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
190 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
48 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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1answer
247 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
678 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
236 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
4k 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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338 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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38 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
110 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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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
555 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
620 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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2answers
99 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
125 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
525 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
890 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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96 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
6k 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
705 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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1answer
155 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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2answers
438 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
364 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
90 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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1answer
935 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
77 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
533 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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29 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 ...