Questions tagged [land-survey]

The measurement of landscape features and their positions.

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11
votes
1answer
2k views

How to compare aerial and satellite images for land use analysis?

I am interested to compare the land use-cover dynamics for four periods: 1950s, 1980s, 1990s and current for a certain area having a max size of 5000 ha. For the first three periods detailed aerial ...
11
votes
4answers
644 views

Given a list of surveyor points, what is the algorithm used to simplify the points and retain the terrain characteristics?

Given a terrain and surveyor points sampled from from it or from its contours, is there any algorithm that one can use to simplify the points ( i.e., reduce the surveyor points number) and at the same ...
10
votes
1answer
2k views

Teaching Python to Land Surveyors [closed]

Does anyone have any good examples of using Python to automate or simplify common surveying tasks? I'm teaching a Python/ArcPy lab this week for a GIS class. There are a number of surveying ...
9
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5answers
4k views

How can I find positions on my land?

I have about 2 acres of land, wooded and brushy. There was a survey and the corners have rebar. I am working on a site plan for house construction. I have two related problems: Finding a spot on the ...
9
votes
3answers
5k views

What to consider when hiring aerial LiDAR survey? [closed]

My organization is considering hiring a company to capture new LiDAR data to help with current stormwater issues that we are currently experiencing. I am a GIS analyst that has been assigned with this ...
9
votes
1answer
305 views

Large survey on unconnected underground networks

We (read I) are currently surveying all the stormwater pits and pipes in our shire, and have run into a few issue with handling unknown network connections. The problem is that a lot of our network ...
8
votes
5answers
6k views

DIY easy and ~accurate small-scale landscape survey

Summary Is there any equipment that I can rent 'inexpensively' (less than $400) that would allow 1-2 people to accurately (+/- 6") capture the topography of hilly terrain of perhaps 250' on a ...
8
votes
1answer
353 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 ...
7
votes
1answer
121k 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 ...
7
votes
3answers
7k views

Do's and Don'ts for GPS Localization

We have recently purchased some new GPS survey gear (ProMark 500) and we have set up a localization around the town using some of the known survey marks. While I'm pretty confident that I have got it ...
7
votes
3answers
28k views

Outline a plot of land on a map

A client has a very old Certificate of Ownership document for a plot of land. We need to show the outline of the plot on Google maps to potential developers. Sadly the description of the plot is in ...
7
votes
3answers
360 views

Establishing survey marks

We are currently getting some new survey marks established in the main town of our shire, we have been told that there are different orders based on accuracy: 1st, 2nd and 3rd both for horizontal and ...
7
votes
2answers
537 views

What does map scale refer to in map making / field survey metadata?

If I have, say, a printed map at the scale of 1:20000 and the legend says that it was mapped at a scale of 1:10000 does this simply mean, that the surveyors/cartographers made drafts & sketches or ...
6
votes
5answers
2k views

Landscape software to analyze amount of dirt moved

I'm about to embark upon a design project for re-contouring landscape around my home. Assuming I get an accurate measurement of the landscape into the computer, and after I modify the landscape model ...
6
votes
2answers
6k views

COGOing Legal Descriptions using ArcMap

I successfully used the COGO traverse tool to create a polygon for a piece of property described in a legal description. My issue arose because it did not line up with data I already have of the area. ...
6
votes
4answers
2k 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 ...
6
votes
1answer
1k views

Has anyone used QGIS as an alternative to Terrasync or ArcGIS mobile?

We are planning to purchase a rugged field computer (Trimble, Juniper, Ashtec etc.) for accurately surveying habitats and work sites in remote locations. In the past we have found that the software ...
6
votes
2answers
480 views

Survey Data to GIS database [closed]

This is a General Question on a possible workflow for Survey Data directly to ArcGIS In most GIS/Survey workflows there is a field collection team and backoffice GIS team. When the availability of ...
5
votes
2answers
6k views

Can we create topographical map of private land using GPS elevation data?

Is there a way to create a relatively precise topographical map of a private land using GPS elevation data? As the land is a little bit over 100,000 square meters, the available regional topographical ...
5
votes
1answer
3k views

Coordinate systems and bearings

Ok so I've got a noodle scratcher and want some input before I open my mouth to my higher-ups. I recieved a new boundary description from a surveyor that uses metes and bounds in the form of bearings ...
5
votes
2answers
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 ...
5
votes
1answer
539 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 ...
5
votes
2answers
1k views

Checking if points are concyclic before solving three point resection?

I'm trying to write a function that solves the three point resection problem using Tienstra method. I gathered a lot of papers and books about this problem, and each one of them states: If the ...
5
votes
1answer
915 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 ...
5
votes
1answer
176 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 ...
4
votes
3answers
3k views

Parcel Fabric vs. Polygon feature class (for land parcel management)

I'm wondering if I should migrate my existing parcel polygons (stored as a feature class in a geodatabase) to a parcel fabric in ArcMap. What are the advantages of doing this? I work for a county so ...
4
votes
2answers
10k views

How to Calculate North?

I am working on a field survey and a client requirement is to differentiate various norths, like magnetic north, true north and grid north. My question is what is the methodology of calculating north ...
4
votes
2answers
1k views

Land Administration Domain Model example implementations

Does anybody know of a sample implementation? I am currently trying to adapt it to my country but the LADM is rather abstract. Anybody have any idea how to go about this?
4
votes
1answer
2k views

Mapping points from total station data in Angle, Horizontal Distance, Vertical Distance

I am working on creating a contour map from total station topo points in ArcGIS 10. The points were collected using H angle, HD, VD instead of XYZ points. I need to create points from these ...
4
votes
3answers
5k views

Plot Canadian (Alberta Province) township, range, and section data on Google Maps

We are working on a project where we need to plot some part of Canada (Alberta) over Google Maps. We can plot maps on Google with coordinates (lat/long) or geometry values. But our client provided us ...
4
votes
3answers
4k views

How to Generate Points on Corner of Polygon Only

I have a polygon layer made up of grid cells, illustrating a survey system: I'm trying to create a point on each corner of the polygon. I've used a geoprocessing tool called "Feature Vertices to ...
4
votes
1answer
1k views

Interactive maps for a survey - Are there any tools yet?

i am working on a draft for an online-based survey. I would like to enable the participants of the survey to draw polygons, lines and points (several) on a basemap (e.g. google maps) and (extra ...
3
votes
2answers
3k views

How can I get Sokkia total station .RAW file data into ArcGIS

I have a .raw file from a Sokkia total station. I want to view the data in ArcGIS and create contours from this data. Can anyone help? The survey analyst extension is longer supported in ArcGIS 10....
3
votes
1answer
1k views

How to make survey lines within polygon?

I am trying to figure out how to make survey lines within a polygon. So first I make a polygon. Now I need to fill this polygon with lines, where I can choose the spacing between the lines, and the ...
3
votes
1answer
717 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 ...
3
votes
2answers
366 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 ...
3
votes
2answers
152 views

earthquake effects on total station surveys

What I have been wondering is whether an earthquake can affect a closed system survey. We are using Leica TCR 307s and TCR 407s and I was wondering if an earthquake can throw off your fixed points if ...
3
votes
2answers
716 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 ...
3
votes
1answer
2k views

How to display survey calls using the traverse tool?

I use the Traverse Tool to run out legal descriptions on deeds and recorded subdivision plats. I'm looking for a way to display the survey calls once I'm done. Is there a way to do that? I'm using ...
3
votes
2answers
6k views

How to show "First Vertical Derivative of the Magnetic Field" survey data on a map?

I will be given a magnetic survey raster and I am being asked to display this on a map as a "First Vertical Derivative of the Magnetic Field". I've done this before with a different older dataset but ...
3
votes
1answer
3k views

How to generate random points with minimum distances between points in multiple polygons

I am looking to create random points for a random stratified survey. There are three different categories being surveyed; for each, I have a single shapefile, each containing a number of polygons. I ...
3
votes
1answer
2k views

Need advice for localized survey base point

I have a set of 4 control points used for H and V localization. There is a base point located far to the SW of the property. I did not create this myself, but took it off of an existing Pocket 3-D ...
3
votes
0answers
95 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 ...
3
votes
1answer
937 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) ...
3
votes
0answers
1k views

Import vtk file in grass or qgis

last summer I made the relief of a cave, and at this time I returned with Therion software. This survey is in 3d and I can save it in the formats .Lox, .3d, vtk. I would like to import it in grass or ...
3
votes
0answers
2k views

How to set up a base station without known coordinates

I am new to surveying, but need to set up a Topcon controller with Pocket 3-D to run 2 receivers and a grader running off the base receiver for my new job. It sounds stupid, because I can't seem to ...
2
votes
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 ...
2
votes
3answers
1k views

Multiple font markers in shapefiles in QGIS?

I'm making a UK phase 1 vegetation survey map and require to show the dominant plant species in a given polygon. In phase 1 these are shown as 2- or 3-letter codes e g Ri, Cys. These codes need to ...
2
votes
2answers
1k views

How to Convert Property Survey Monument Marker Coordinates to State Plane?

I have a set of Connecticut monument locations (a monumented property survey using monuments designated CGS Mon. No. 1577-1580). Their coordinates appear to me to be in meters (244536.84 N, 386409.67 ...
2
votes
3answers
1k views

Snap! vs. Fulcrum for GIS data collection offline?

I am evaluating field data collection form-making apps and looking at Snap! or Fulcrum, or something else you know about that I don't! The key features it needs to have are: Map-based: I need to ...