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Questions tagged [units]

For questions regarding the increments used in measuring values.

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1answer
48 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
56 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 ...
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0answers
52 views

Difference between units in QGIS: Map Unit vs. Millimeter vs. Inch vs. Pixel vs. Point

In QGIS 2 there were three Unit types: Map Unit, Millimeter and Pixel. With a new version of QGIS 3 two additional arose Inch and Point. What is the difference between those Units, in sense of their ...
2
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1answer
74 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
53 views

How to create unit and quantity “amount per area unit” in JSR-363? [closed]

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
59 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 ...
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1answer
82 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.
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1answer
56 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 ...
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1answer
54 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 ...
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1answer
45 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?
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1answer
28 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
114 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 ...
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2answers
78 views

Where can I lookup the units associated with an 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 spatialreference.org and fetching URLs like this: http://...
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1answer
34 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
81 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 ...
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1answer
111 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 ...
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1answer
782 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 ...
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2answers
35 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 ...
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2answers
21 views

How do I check my map units (needed for Point Density Tool)?

The Point Density Tool in ArcMap asks me to specify cell size in map units, but I am confused as to how to find out exactly what my map units are (e.g. whether they are based on the data frame ...
2
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1answer
177 views

Is it possible to change the measurement unit in QGIS 3.2 for the select features by radius tool?

Is it possible to set the default units for the select features by radius tool? I believe the default is set to meters but I can not seem to get it to use kilometers or miles for example. I know you ...
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1answer
57 views

Changing unit of measure of Draw tool in ArcMap?

How do I change the unit of measure when using the drawing tool in ArcMap 10.5.1, like indicated in image?
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2answers
55 views

Measuring a Buffer

If I create buffers around coordinate points using a linear unit of measurement, is the distance I input the radius around the point or diameter? For example, if I input 800 meters, will it form a ...
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2answers
248 views

Arcpy UpdateCursor 'SHAPE@X', 'SHAPE@Y' in decimal degrees

I have the code below that works, however I want the units to be in decimal degrees. How do I force this? fields2 = ['cent_lat', 'cent_long', 'SHAPE@X', 'SHAPE@Y'] with arcpy.da.UpdateCursor(fc,...
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1answer
214 views

Change multiple polygons' area from square degrees to square meter in attribute table with QGIS

I imported an ESRI personal geodatabase vector file (.mdb file) into QGIS, when I open the attribute table, it seems the the shape_area unit is in square degree. I changed the project properties to a ...
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1answer
300 views

Advanced Digitizing Panel angle units

I have QGIS 2.18.3 installed. I'm trying to change angle units from degrees to Gon/gradians (90 degrees = 100 Gon). I navigated to Settings--> Options --> Map Tools --> Preferred angle units, and ...
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1answer
48 views

Increase maximum line style width

I'm drawing lines in QGIS and need to specify the width as map units because I want the width to be the same, regardless of scale. The projection I'm using is standard in my field so I don't want to ...
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0answers
198 views

Why is DWITHIN filtering my data with native EPSG 4326 with meters instead of degrees?

Ok so I have a PostgreSQL Table, to which I added a PostGIS geometry column using: SELECT AddGeometryColumn ('public','my_table','geom',4326,'POINT',2); Followed by: UPDATE public.my_table SET geom ...
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0answers
153 views

ArcGIS Pro map units locked as Degrees - how to change to Meters

Instructions here don't seem to add up. I'm not able to change the map units to Meters. Is there another way?
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1answer
243 views

In QGIS, my contour layer is always in meters despite settings, and DEM [closed]

I have a DEM file in Raster Layer that has elevations in meters, I have used the Raster Calculator to convert them to feet, and saved as a new DEM layer. The legend shows feet. When I run an ...
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1answer
743 views

Calculate distance matrix in km units

I would like to create a distance matrix and have as output the distances expressed as kilometers (km). Here my current output, which I believe is in degrees and NOT in km: My coordinate system (CRS)...
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2answers
619 views

Kernel Density Tool - Can't change Area Unit?

When I pull up the Kernel Density tool in ArcMap Desktop 10.5.1 I can choose different options for the Area Unit. As soon as I choose a point input feature class, this feature becomes grayed out and ...
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1answer
210 views

Combining DEM Rasters from different sources in ArcGIS Pro

I am a GIS hobbyist trying to create a merged DEM of the St. Louis region in ArcGIS Pro 2.0. So far I have been successful in creating two mosaics, one of the Illinois side of the Mississippi River ...
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1answer
296 views

ArcGIS convert distance unit

I would like to change a distance unit on Euclidean distance analysis. How can i change the current unit to feet or meter? what unit is the unit for 0 and 0.18939. is it degree?
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1answer
1k views

Understanding aspect units in QGIS

I created an aspect raster form a DEM raster in QGIS 2.14, and got this results: I know that the results refer to degree units , but still i don't understand how to read the map result- i mean to ...
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0answers
79 views

exporting dem to png give black image

after inspecting the gdalinfo of my input file : Driver: GTiff/GeoTIFF Files: elevation.tif Size is 5555, 2525 Coordinate System is: GEOGCS["WGS 84", DATUM["WGS_1984", SPHEROID["WGS 84",...
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0answers
1k views

Creating a variable distance buffer in QGIS [closed]

I have a QGIS project with a shapefile (CRS:WGS84) overlayed on a googlemaps satellite layer. My shapefile consists of many GPS coordinate points measured in decimal degrees, and another field for ...
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0answers
379 views

How to change the map scale units for ArcGIS Online printable maps?

I have a web app created from the ArcGIS Online Basic View template. I added print functionality to the web app as seen in figure 1. You can see in figure 2 the scale units are set to miles/kilometers ...
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3answers
2k views

What units are used for coordinates in geographic and projected coordinate systems?

I'm trying to grasp the basics of GIS but my literature seems to leave out some of the basic concepts (or it's just very vague). What units are usually used for coordinates in a geographic coordinate ...
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1answer
358 views

In what units do area calculation in geographic coordinate system return?

Is it correct to call it degrees square? Will it be the same if calculate the area using Plate Carrée projection?
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0answers
24 views

QGIS 1.8 and Shapefile units in seconds [closed]

I have QGIS 1.8 on Centos 6.5 (I cannot update this system). I have a problem with opening a shapefile layer with units in seconds (created in ERDAS). QGIS doesn't display and doesn't save ...
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0answers
230 views

Coordinate system for South Africa

What coordinate System can I apply to South Africa in GE Smallworld 5.1?The CS units should be in meters. 1.I understand that the datum used is 'hartebeesthoek_1994' , Is it necessary to create '...
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0answers
223 views

Scalebar doesn't match up with actual dimensions

Every time I make a map, the scalebar doesn't match with what the real dimensions of my map should be. I've been doing maps of Chicago in CRS: NAD83 and every time I put the map in the print composer ...
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2answers
608 views

1ft contour shapefile displaying in meters

I generated a shapefile that has 1ft contours. It works great when imported to QGIS except the elevation labels are displayed in meters instead of feet. I've found two places to select feet as the ...
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1answer
1k views

Adding units to numeric labels in ArcMap?

How do I add the distance units to labels in ArcMap? I have the area calculated and would like the label to be displayed as (XXX sq ft). I was able to write a VBScript of "(" & [AREA] &" ...
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1answer
599 views

What are the units of the QGIS roughness tool results?

When I estimate Roughness, using QGIS [Raster > Analysis > DEM (Terrain models)], what is the unit of the values I get?
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1answer
6k views

How to interpret cell size ArcGIS?

I have a raster layer that has cell size(x, y) 0.008928, 0.008928. I download it from the website as 1km resolution data under WGS_84. I can not find the unit for these numbers in the metadata. Is ...
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1answer
2k views

How to Change the buffer distance from degrees to meters in QGIS 2.14 Essen?

I am new to QGIS and the whole field of GIS in general. My project and all its layers are set to the CRS of EPSG:26913, NAD83/UTM zone 13N. I am trying to use the geoprocessing tool Buffer(s) on a ...
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1answer
35 views

Measure length in specific units like 'aln' arcmap

I have an old map in aln, 1 aln=0.5934 meters. I would like to draw lines using directly this measure unit without having to convert in meters each time to draw the lines. Is there any way to ...
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2answers
135 views

Is there an equivalent to Map unit in ArcMap?

I need to have points, lines and texts in ArcMap in map units like in QGIS so I can zoom to the feature and see it like it's a raster. Is there anything I can do to manage that? I use ArcMap 10.2.2
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3answers
3k views

Area units for output polygon in WGS 84 UTM Zone 32N using QGIS

I am calculating the area of my polygon and I have used WGS 84 UTM zone 32N to calculate the area (using geometry on the field calculator) of my polygon, and I obtained 745461 (without units). How ...