The measurement of landscape features and their positions.

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11 views

Is there a way to measure percentage of certain colors in old Ordnance Survey maps (UK)?

It might be a long shot as I am not a programmer, but maybe such a code exist. I have a list of 26,000 lat/long spots in London, and for each of them I want to measure the share of developed in the ...
3
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1answer
37 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I am trying to do a differential surveying project with some outdated equipment, specifically: -An old AllegroCX personal handheld computer (Win 4.1) with SurvCE loaded on it to collect data and ...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
14 views

Issue with a Leica RX1200

Just got handed a Leica RX1200 unit (which I'm not familiar with). When I turn it on it opens up the window/select program screen and almost immediately switches to a perpetual hourglass icon. We'...
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1answer
81 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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1answer
102 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
128 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
76 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 ...
2
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1answer
234 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 ...
2
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1answer
62 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
12k views

How to locate 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 ...
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472 views

How do I get the lat-long coordinate of point 1 from a survey plan [closed]

Here are the data from the survey plan: TIE LINES from BLLM No. 3, PLS 561, to corner "1" of: LOT ----------Bearing--------------------Distance Boundary ----S 36deg 41min W ------11,641.21 meters ...
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3answers
1k views

Using Plat Plotter - Calculate Curve Table feature given an arc and radius

Plat Plotter has a Calculate Curve Table feature that generates a sequence of points for use in drawing plot lines. To put another way, it converts a curve into several short, straight segments ...
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121 views

Software that converts from legal description text?

Is there software that takes legal description text as input for conversion to some computer friendly GIS format? For example: Those portions of the North Half of the Southeast Quarter and the ...
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1answer
1k 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 ...
2
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1answer
69 views

Can I capture shared vertices with a Trimble GPS?

I'm trying to figure out how to use Trimble GeoXT and GeoXH GPS receivers to efficiently capture small farm fields in rural areas. The main issue that I'm struggling with now is trying to deal with ...
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0answers
150 views

What are the top 5 file types for 3D model?

I don't know much about GIS but I'm investigating a project that requires a 3D model of a hilly large town (town centre, suburbs, golfcourse, etc.). I'm not certain which file-type of these ...
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3answers
825 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 ...
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1answer
337 views

Basis of Bearing in ArcGIS Parcel Fabric

Can someone explain how to handle a basis of bearing (a rotation factor for an entire parcel fabric) in an ArcGIS (10.2/10.3) parcel fabric? I have a set of parcels at the edge of an SPCS zone, so ...
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2answers
72 views

Creating points from an Annexation Ordinance description [duplicate]

I would like to be able to draw points in ArcMap using information provided by an Annexation Ordinance. I use ArcMap 10.3 with a Basic License Not having much experience in working with ...
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1answer
63 views

Water diving and depth measuring equipment

We go to villages and forest to deepwell rig for water. Can anyone help in identifying a GPS and water depth measurement devices please? we do 4-6" deepwell rigging for ground water in mozambique ...
3
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1answer
473 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 ...
4
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1answer
406 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 ...
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18 views

Converting angles and distances on Allotment map to North/East coordinates? [duplicate]

I have an allotment map with angles and distances but no North/East coordinates. Instead it has at one corner some numbers which I suspect are the coordinates but in some different form. Please ...
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2answers
3k 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 ...
3
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1answer
666 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 ...
2
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1answer
42 views

Are there free maps available that can show me land planted with oil palm?

Currently I am taking gps coordinates of oil palm plantations in Africa. I'm putting the waypoints in a GIS program but the free basemap provided isn't always giving high resolution images, making it ...
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0answers
295 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 ...
4
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1answer
414 views

How to check 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 ...
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0answers
679 views

Exporting Leica Geo Office points to view/edit in ArcGIS for Desktop?

I've got some points recorded with a leica 1200 rover, which I now have imported into Leica Geo Office. I want to export these to view and edit them in ArcGIS for Desktop. I recorded their properties ...
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1answer
400 views

Direction and Distance Point Placement

I'm working with 19th century land tax records that provide a direction (expressed as NW, SE, etc.) and a distance in miles from the court house. The info in the Land Tax Records (LTR) is in effect a ...
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2answers
975 views

How to enter quadrant bearings into Copan map check

I am attempting to convert, to a 360 degree basis, the normal bearings in a survey. The following are the original survey bearings (2nd column) and on the right (4th column) is the 360 basis amount I ...
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2answers
541 views

Data format for checking a land survey deed

A commercial property is in the closing phase of sale and the only hold up is that the deed description is one that's been lifted from prior deeds dating back to the 1950's and is obviously erroneous. ...
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2answers
871 views

Plotting property surveys using AutoCad MAP2013 - Draw arc problem

This is likely a simple question that I just can't seem to answer. I am plotting some surveys in AutoCad Map3D but I simply can't figure out how to draw an arc using survey coordinates. The large ...
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1answer
1k views

How to identify township range and section from longitude and latitude

I have several hundred coordinates in an Excel file. I would like to identify the township range and section they are located--what is the easiest way to do this? I have you QGIS and basic GIS skills (...
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2answers
3k views

COGOing Legal Descriptions

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. ...
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1answer
292 views

Acceptable traverse field file syntax for processing on Copan, with azimuths reckoned from south

I'm looking for a way to properly process .RAW traverse data from Nikon DTM on Copan 11.11. These points, after calculations and processing, will later be used as points in a thematic map and a .dwg ...
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3answers
140 views

Is there demand for a higher resolution alternative to GPS tracking in the GIS market?

If there was an alternative to GPS that provided higher resolution tracking, what applications would there be for it in GIS? Note that this means higher resolution, but not necessarily higher accuracy....
2
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3answers
505 views

Convert surveyor's calls in excel table to polygon shapefile

Do you know of a way to take surveyor's calls from an excel file (for example: N35-45-15W 60.0 ft, etc) and have them generate polygon shapefiles point by point in GIS? I know you can easily do this ...
3
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1answer
591 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 ...
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1answer
135 views

What is the best tool to measure latitude the most accurately?

I'm thinking it's the sextant but not sure. I tried looking it up on Google and came across this site but have found nothing useful. I am doing this for a research paper and need help. Thanks to ...
7
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2answers
346 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 ...
11
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1answer
707 views

Teaching Python to Land Surveyors

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 ...
3
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2answers
4k views

How to Calculate North?

I am working for field survey & client requirement is differentiate various north,like magnetic north,true north & grid north.So therefore my question is what is the methodology of calculating ...
0
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1answer
466 views

Looking for a tutorial on syncing QGIS with Trimble ProXT

Does anyone have any experience/advice to sync a TrimbleProXT gps antenna with the current "Lisboa" 1.8.0v? Additionally did you manage to collect features (points,line,polygons) in the field ok? ...
3
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2answers
756 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
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3answers
2k 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 ...
10
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1answer
961 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 ...
2
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2answers
119 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 ...
7
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3answers
4k 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 ...
5
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5answers
796 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 ...