Questions tagged [units]

For questions regarding the increments used in measuring values.

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32 views

How To Set QGIS Map Units To Inches/Imperial?

I'm trying to recreate QGIS-equivalents of ArcMap/ArcGIS Pro maps originally created in inches/imperial units. I wish to retain the same units for the QGIS maps but have run into problems. I can't ...
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0answers
28 views

Change vertical unit in a LAS/Z file with PDAL

I am using pdal translate to filter and transform some lidar files. One issue we have are the vertical units. Sometimes they are correctly specified, sometimes they are not, and sometimes they are ...
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0answers
94 views

Meaning of scale ratio in QGIS

I am new to using QGIS and I cannot find definitive information about how to intellectually use the scale ratio shown at the bottom toolbar. There is a number of predefined scales, with the format ...
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1answer
78 views

What unit is represented by OD Matix costs (in QNEAT3 within QGIS 3.6 Noosa)?

Some background to explain what I have done, and thus my current question (at the end). I am trying to find a way to get a list of the distances between sites of a certain class to the nearest site of ...
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14 views

NLCD Detection Limit of Land Classification

I am working on a project with NLCD 2016 data that involves calculating the percentage of each land cover class around sites. I have this working, but need to impute zeros around each site for the ...
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0answers
72 views

Incorrect measurements when using "Create Grid" tool in QGIS

I am using the "Create Grid" tool in QGIS to simply create a 25x150ft grid. I am using EPSG:3857. When I select my parameter I want and run the tool, I double-checked the dimensions with the ...
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0answers
44 views

Wrong scale units when reading raster grib2 in QGIS 3

I downloaded grid2 files to read meteorogical variables. I wanted to read them through QGIS 3.10.2 (windows and I have to stick with this version) but I encountered problems with the scale of the ...
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117 views

Converting Euclidean Distance into meters using ArcGIS Pro

I used Euclidean Distance tool on a vector layer (school, point) and in the output raster layer, the distances are in weird unit and the distance ranges from 0.01 to 0.32. How do I convert the ...
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1answer
22 views

How to change "metres" from "degrees" without change of location? [duplicate]

I am working in QGIS (version 3.10). I know that in order to make certain distance analysis (in my case I want to do a heat map) a layer should have meters as units. Initially from the automatic SRC ...
2
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1answer
49 views

Changing degrees to metres [duplicate]

I got a shapefile which is in degrees format. For a vector analysis, I need it to be in meters to set a maximum distance. I can't do that with degrees. I know about on the fly CRS change; That's not ...
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1answer
210 views

What are default units for coordinates in Create Fishnet tool of ArcGIS Pro?

This has been a reoccurring issue for me using ArcGIS Pro - when creating a fishnet and specifying the extent from an existing layer and subsequently trying to set the cell size, I am getting a ...
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1answer
69 views

How to print at an architectural scale?

I'm a landscape architecture student who is starting to learn QGIS. How would I be able to manually input a scale I want in inches to feet when exporting for print? For example, if I would like to ...
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2answers
69 views

Rasterio Python not reading "pixel" values correctly

I'm trying to simply get the NIR values from Sentinel2 in python. It should be as simple as #import required libraries import rasterio band8 = rasterio.open('R10m/B08_10m.jp2', driver='JP2OpenJPEG') #...
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1answer
28 views

Forcing v.buffer distance units to be different from map proj units using GRASS GIS

I'm not very familiar with GRASS GIS. I am working on MODIS data, and set the region to match the projection of the data, which is given in degree units. I need to create a buffer with a 250m distance,...
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1answer
53 views

Changing Linear Units on Scale Bar to a unit not listed [duplicate]

In ArcMap, how can I change my linear units on a scale bar for layout view to a unit not listed on the drop down menu in units of the scale bar? I want to get survey chains in my map as a scale bar.
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1answer
23 views

How do I change the display unit without changing the coordinates numbers?

(X= 716 562,800911 Y= 3 568 493,622591 "Decimal Degrees") My problem is that the coordinates are correct but displayed with the wrong unit, it should be meters. When I try to use the ...
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0answers
71 views

QgsLayoutItemScaleBar.setUnits does not work

I'm writing a plugin that allows to automatically export a map with a predefined layout, based on the content of the canvas. I need to have a scale bar in nautical miles, so in my code I add a ...
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1answer
63 views

How do I know that ArcMap is running a tool using meters as the unit?

I am not sure how to tell what units ArcMap is defaulting for with the tools it is using. For example, I am currently trying to use the line density tool to create a road density layer. I need to use ...
3
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0answers
109 views

Creating custom scale measurement for QGIS project

I started to make a map based on a raster (a scanned paper map). The map obviously has not geographic coordinates or a projection. The map comes with its own scale, and I would like to somehow make my ...
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2answers
165 views

Is AVHRR 5.3 SST data correct in Google Earth Engine [closed]

I am curious about how to scale the units of the AVHRR 5.3 Sea Surface Temperature data. The original units of this dataset is K, but it also has a scale factor of 0.001 (I'm not sure for what). The ...
4
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2answers
500 views

Correlating mol/m^2 with ton and lb? [closed]

How do I compare tropospheric_NO2_column_number_density(mol/m^2) of Sentinel-5p with EPA statewide emission data which unit is Ton or lb? Goal: My goal is to compare remote sensing no2 emission ...
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1answer
120 views

Distance matrix expressed in meters

I'm aware that this is the hundredth (possibly more) time someone asked about the distance matrix that is expressed in degrees, but should be in meters. I read most of the questions, online guides, ...
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1answer
196 views

Raster projection units in QGIS

I imported a raster into QGIS but it is not displaying correctly. The workspace projection is WGS84, Zone 39N, with units of meters. The raster is in the same projection, except in U.S. feet. The ...
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0answers
24 views

How creat a circle in meter unit, at GCS_WGS_1984 coordinate?

My shapefile coordinate sysytem is GCS_WGS_1984. I use the editor tool to draw a circle. EX:Right click to enter the radius in 100 meters. The unit seems to be degree. I want draw a circle which unit ...
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1answer
435 views

Issues with units for Geometry by Expression in QGIS 3.10 - Super-sized buffers! [closed]

I am having issues performing a geometry by expression operation on a layer I have imported into QGIS. The issue is that the wedge buffers created by the expression I am using are far larger than they ...
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1answer
43 views

What are the units for MapPoint M value with spatial reference WGS 84? [closed]

Is this something I can convert to miles or meters? What is the equation?
3
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1answer
1k views

What are the X Units for an elevation profile and how can I change them to meters?

The question: How do I get a simple elevation profile for a line using QGIS 3.4 with height/distance in either meters or feet? The problem: I have the same problem using both Profile Tool and qProf ...
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1answer
1k views

Change units from degrees to meters in QGIS 3.6 [duplicate]

I'm cleaning up shapefiles (mainly for US areas) in QGIS 3.6 to import into other CAD environments such as Rhino. One problem encountered is that the units are in degrees, resulting in imports being ...
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0answers
52 views

PostGIS ST_Point_Inside_Circle radius unit [duplicate]

I'm trying to use the ST_Point_Inside_Circle function from PostGIS but I'm not sure about the unit the radius is stored. Let's say I have a table with the following points: Id | Point 1 | ...
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1answer
1k views

Canging coordinate system units from mm to m using ArcMap

I've received a feature dataset, that has a wrong amount of digits/wrong unit as coordinates. The coordinate system is actually a variation of Gauß-Krüger, which coordinates normally look like in this ...
2
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1answer
819 views

Measuring area using correct CRS and units in QGIS

I have uploaded a shapefile and I am simply trying to calculate some simple areas of provinces (and I know their areas from Wikipedia). My map is from Zimbabwe, and I have saved the project, ...
2
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1answer
138 views

Knowing/converting AREA, PERIMETER units in QGIS?

I use Convexhull tool in QGIS and there are result value : AREA = 0.0017494390 PERIMETER = 0.1725495172 I thought the result was strange. So, I took a rough estimate of the points through the ...
5
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1answer
546 views

Difference between visual units in QGIS

In QGIS 3.10 (Latest LTR) there are several unit types, see image below What is the core difference between those units, in sense of their visualization behaviour on the Map? What I noticed by so far,...
3
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2answers
569 views

Which Units Geometry Generator in QGIS works with?

While modifying some geometries in QGIS in my previous question Adjusting flow map styles in QGIS: Varying buffers' sizes I ended up with a huge confusion regarding the dimensions/units that Geometry ...
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1answer
688 views

How to create unit and quantity "amount per area unit" in JSR-363?

I am trying to integrate units and quantity with JSR-363. I know and understand how to create SI and NONSI units and convert e.g. Areas units from one to another. But, in a kind of geographic ...
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1answer
902 views

QGIS Identify feature Cartesian area in degrees

In QGIS 3, the identify feature tool automatically calculates area. However, there are two areas: Cartesian and ellipsoid. The first is being calculated in degrees (not wanted) and the second in ...
1
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1answer
717 views

LS Factor in SAGA (slope units)

In which units do I have to calculate Slope to use as an input for the LS Factor tool in SAGA (degrees, %, radians)? I couldn't find anything in the documentation.
2
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1answer
420 views

Units of specific CRS projection?

I use a shapefile with CRS ("+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0"). I want to calculate a buffer around the points with 'extract' from raster package. How can I know the ...
4
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1answer
627 views

How does $area function calculate area in QGIS?

I have a 550 meter by 550 meter square polygon in a shapefile. The QGIS 2.18 project and the shapefile both reference EPGS:32648 WGS84/UTM48N. EPGS:32648 uses meters as the units. When I use $area to ...
2
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1answer
206 views

LiDAR data in GPS time, only in second. Missing week?

I have LiDAR data LiDAR Data captured, unsure what units or format this time field is in? which I learned that my LiDAR data is in GPS second, however I do not have a column of data which shows the ...
3
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1answer
224 views

LiDAR Data captured, unsure what units or format this time field is in?

I haven't been able to figure out or find out from searching around what units or format this time field is in my LiDAR data that was collected?
2
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1answer
87 views

Change unit in Split tool on ArcGIS Pro?

I'm working on a project with a CRS in meters, map units and display units are also in meters, but Split tool (from Modify features) is in feet: Is there a way to change unit to split based in a ...
3
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1answer
1k views

Units for Area on QGIS - need to convert to square meters

I have a shapefile with building footprint outlines. I am trying to identify buildings that are a certain size in meters squared. The shapefile that I has, has a SHAPE_Area column, but I cannot tell ...
3
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3answers
604 views

Where to lookup the units associated with EPSG code?

I'm trying to find a source of information with the default units (meters, ft, ftUS) associated with an EPSG code. I'm currently using https://spatialreference.org/ and fetching URLs like this: http://...
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1answer
204 views

Converting proximity from PIXEL distance to GEOmetric distance in QGIS

I used the Raster>Analysis>"Proximity (Raster distance)" tool in QGIS in order to create a raster of distances to a particular value in another raster. This is the same sort of thing someone might do ...
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0answers
296 views

Changing Units of a prj file in ArcGIS

I have a multipatch feature class which comes from a conversion of a IFC model. Its coordinate system is very strange ("IFC_COORD_SYS_0") and I'd like to change it to EPSG:32632. I am using ArcGIS ...
1
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1answer
433 views

Displaying Distance in Miles for Elevation Profile using Profile Tool in QGIS

I am attempting to generate an elevation profile in QGIS 3.2.2, with elevation in feet, and distance in miles, using Profile Tool. I have managed to convert my DEM files to feet, and the elevation of ...
1
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1answer
4k views

Setting cell size on "Polygon to Raster" tool, in ArcGIS?

How do I properly set the cell size that I want when converting polygons to raster files? Also on the raster file Layer Properties what exactly does the Cell Size indicate, as it doesn't seem to ...
1
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2answers
60 views

QGIS Shapefile - Units/Editing Shapefile

I have a Shapefile that has properties/parcels as polygons. I am looking to select by parcels that are bigger than a certain size in acres. The problem is that the Shapefile has the properties/parcel ...
2
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1answer
1k views

Changing units in QGIS: degrees to meters

I have a global map with CRS WGS84-EPSG:4326 and I want to calculate the area of my polygons. From what I read, to change the unit from degrees to meters I need to change my CRS. However, there is no ...