Questions tagged [scale]
The ratio between distances on a map and distances in the world
415
questions
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17 views
QGIS Why is the size of pie charts assistant different from symbol size assistant?
I want to plot a pie chart on a map (layer: BT stations_all). The pie chart circle should be scaled, so that its comparable with other values that take similar ranges (i.e. same legend). In the pie ...
0
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0answers
17 views
How do I scale my raster x and y values?
I am extracting cross sections from a DEM which is only available in meters. I need my cross section (x,y) data in feet. Scaling the vertical raster values is straightforward enough using the "...
0
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0answers
32 views
Manipulating the shapefile and made a zoom effect of city districts in QGIS
I need TopoJSON file for use in Power BI with a map where the city districts are zoomed/scaled and placed outside the country in the map.
Here is a map I have made in ArcMap Desktop https://webguru....
0
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1answer
18 views
Exporting DXF in 1:1 Scale
I'm trying to export a parcel map as a DXF to scale. Initially I was having issues because my projection was set to WGS 84. I looked through the public questions on GIS StackExchange and learned that ...
0
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2answers
42 views
Export Sentinel-5P imagery from Google Earth Engine in native resolution
I want to access SO2 data from Sentinel-5P on Google Earth Engine and get the mean values over a period of two years. According to the documentation (https://developers.google.com/earth-engine/...
3
votes
1answer
38 views
“Scale range” vs “Scale dependent visibility” when labeling features using QGIS
What is the difference between "Scale range" vs "Scale dependent visibility" settings when labeling features using QGIS?
From my perspective they are identical.
1
vote
1answer
31 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 ...
5
votes
1answer
64 views
Choosing extent and scale while exporting a map
I'm exporting a map to a PNG file in QGIS 3.10.4 via Project > Import/Export > Export Map to Image. In the dialog that shows up, I can select the extent (exported area), scale, resolution (DPI), ...
1
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1answer
42 views
Scaling georeferenced image to half of its size using QGIS
I want to rescale a georeferenced image half of its size using QGIS. I tried the Freehand georeferencing Plugin. It is not working properly i.e no option to enter scale factor(0.5). I want to do it as ...
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0answers
22 views
Why the scale of an image generated from the linear regression is not same as its inputs in Earth Engine?
Here is a sample example from developers guide,
https://developers.google.com/earth-engine/guides/reducers_regression
// This function adds a time band to the image.
var createTimeBand = function(...
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0answers
32 views
Preview-problem when editing small polygon-features in QField
I have the following problem.
When surveying small objects on QField, such as structures with a diameter of 20 to 100 cm (with external GNSS-receiver, +- 1 to 3 cm accuracy), a problem with the ...
2
votes
2answers
73 views
Making tiny objects visible for their location when zooming out
I'm adding small features to QGIS that I need to be in a precise location (trail signs) like so:
1:500
However, when I zoom out, they become invisible:
1:10000
If I switch the sizing to millimetres (...
0
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0answers
22 views
QGIS lock mapscale for project
I try to create a QGIS project with a fix scale of 1:50.000. I set the scale in the status bar on the value and save the project. But if I open the project on another PC the scale 1:48699.
I tried the ...
2
votes
0answers
20 views
Resizing objects from Cartesian measurements to Ellipsoidal
I have been working on a project in QGIS 3.12.2 in EPSG 3857 so it works with google earth. Without realising the difference there would be between cartesian and ellipsoidal I buffered some points.
By ...
1
vote
0answers
40 views
Wrong scale in Print layout mode
I´m using qgis 3.16 and have the folowing Problem:
If i´m in the primary Window the scale on the bottom of the scrren shows me a correct value, but if i switch into the Printlayout mode the value of ...
0
votes
1answer
20 views
Size based scaling for symbology in StoryMaps journal
Is there a way to have size based scaling for symbology StoryMaps journal?
Scale based sizing of symbols works in ArcGIS Pro, and web map has been uploaded to my organization, however when viewing in ...
2
votes
1answer
32 views
QGIS - Exporting a raster layer without smearing individual rasters (so you can zoom)
I've been working with a raster map in QGIS (a shape file made up from squares) and now I'm trying to export it. I want to create an overview map for Germany that allows some magnification to look at ...
0
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0answers
27 views
QGIS 2.18 Scale not being set up correctly
I'm working on adding scale based visibility on different layer. I'm currently using :
canvas.setDestinationCrs(crs)
crs.createFromUserInput(name)
crs = QgsCoordinateReferenceSystem()
to set ...
1
vote
2answers
48 views
How to calculate pixel size on image of map?
I have to save to .png file with part of map from app.
I've got information about PPI, easting/northing, print resolution, map scale and map coordinate system and using this information I have to ...
0
votes
0answers
63 views
Adding QGIS coordinate, scale, magnifier and rotation toolbar into custom PyQGIS canvas
I was wondering if it is possible to add a toolbar with coordinate, scale magnifier, and rotation such as the one in QGIS Desktop to a custom PyQGIS canvas on a standalone application.
below is a ...
4
votes
2answers
93 views
Insert a “scale box” of given side length in the QGIS layout?
QGIS allows displaying a scale bar, indicating distances. I would like to complement it with a box showing a given area, e.g. 1 hectare. How can I display this in a layout, ideally as an extension of ...
2
votes
0answers
89 views
Sentinel-3 scaling factor in Google Earth Engine
Does anybody know how to use the scaling factors from Google Earth Engine with Sentinel-3 dataset?
The band values provided in ee.ImageCollection("COPERNICUS/S3/OLCI" by default (GEE, orange)...
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0answers
15 views
After export the clipped Landsat image, it's distorted
I clipped square(polygon) of NDVI and Aster GED dataset and select the scale of 100 and set CRS to native projection and Exported to drive. But when I am Opening this dataset in QGIS it's showing ...
0
votes
1answer
42 views
QGIS 3x problem with rescaling vector (shapefile) layer
I would like to rescale my shapefile layer in a particular location on my map in QGIS.
Unfortunately every time my layer is rescaled in completely different location.
According to this query
Resizing ...
0
votes
1answer
30 views
Why is scale of image different in QGIS 3.10 than created?. CAD import and twf world file seems correct
I created an image by taking a picture of a tape measure(ruler). I rotated this image to north and made a world file .tfw for the tiff image. to get the pixel width for the twf file, I divided the ...
3
votes
0answers
54 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 ...
2
votes
0answers
27 views
Making Symbology Scales same in ArcMap
I am using two sets of data, 'Part' and 'Total'. The part set is what you would think, a fraction of the total. Part = 13 , Total = 29.
I want to overlap this data on a map using Graduated Symbols but ...
0
votes
0answers
145 views
Display Features based on Zoom Level using OpenLayers
I want to display roads(linestring) on the map using OpenLayers.currently, I manage to assign styling based on road type but when I run the server I can see all the data displayed. I want to change ...
0
votes
1answer
306 views
Wrong scale in ggplot2 map
I am trying to create a political map of Morocco with regions, using ggplot2, but the scale seems to be wrong. This is the map:
And below is the code I used:
library(ggplot2)
library(ggspatial)
YK = ...
0
votes
1answer
106 views
Google Earth Engine: Converting raster to vector in the same resolution as the original image
I am using Google Earth Engine to reduce a raster region to polygon vectors. What I want to achieve is:
Obtain a set of polygons each of which matches the grid of measurement in the raster dataset. ...
2
votes
2answers
62 views
Are there a list of locations or features with known dimensions?
I'm plotting lines and objects on a map and want to verify scales with real, physical objects on the map. Is there a list of physical features that are known distances?
Perhaps like the runway at ...
0
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1answer
190 views
Min and max zoom levels/scales for a QGIS project
We've built a qgis project for use in education and we want to set up a min. and max. zoom level (or scale) for the whole project.
In the project properties, we can specify some "project predefined ...
0
votes
1answer
360 views
How to calculate scale from zoom level in Google Earth Engine?
I found the following formula on the interwebs, including on some google group from someone claiming to work at Google:
var scale = 156543.03392 * Math.cos(mapCenter.lat * Math.PI / 180) / Math.pow(2,...
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0answers
56 views
QGIS DXF measurements in AutoCAD are in Cartesian and not Ellipsoidal
I'm trying to export some land boundary polygons to AutoCAD using the Export to DXF function.
The issue I am having is that the distance measurements in AutoCAD, of the exported DXF file, represent ...
1
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0answers
46 views
Map output with multiple “Zoom Levels” in QGIS 3 [duplicate]
Just wondered if it is possible to do BBC-style multiple "Zoom Levels" output in QGIS 3 like this:
I used to use another app such as Adobe Illustrator to overlay the maps of different scales. ...
3
votes
3answers
74 views
How to make the display of a satellite image the same across users?
I have a group of users counting objects in a satellite image. To keep viewing conditions the same I wish each user to have the same display (e.g., the same scale).
To do this, I have asked users to ...
1
vote
1answer
112 views
Scale feature in QGIS
I am trying to scale (up and down) feature(s), similar to ArcGIS where the first click specifies the scale reference point and the second click specifies the scale factor, but couldn't find a solution ...
3
votes
3answers
447 views
Re-scale and move vector layer manually in QGIS
I have imported a dxf file (site layout drawings for proposed development), but its scaling is too small and it does not line up with the google street maps. I want to re-scale the layer manually ...
1
vote
1answer
109 views
QGIS - Scale bar segments
Is it possible to divide a QGIS scale bar into different sized segments as you can in MapInfo (as with example given).
Or is it possible to select different style of scale bars in QGIS?
If it's not ...
0
votes
1answer
118 views
Too many pixels in Earth Engine, and scale parameter meaning
I am trying to calculate stadistics for burn areas based on the number of pixels.
When running the code, GEE says too many pixels, I tried to solve it following the guides given by google developers ...
0
votes
0answers
48 views
Rescale 300 polygons within one shapefile, but keeping the original center position of each polygon
I have a shapefile type Fishnet in ArcMap, containing 300 or so polygons in it.
Each polygon represent an area of interest containing plants. I have a model extracting the zonal stats of the shapefile ...
0
votes
0answers
174 views
Extracting Point data from MODIS with Sinusoidal Projection in Google Earth Engine? (crs:SR-ORG:6974)
I am using Google Earth Engine and my aim is to extract pixel values of MODIS land surface temperature (MOD11A1) at my points of interest with the best accuracy. MOD11A1 data has a pixel size of about ...
1
vote
1answer
28 views
QGIS different scale levels in rule-based styling - in one rule
I have a layer with 4 roadclasses. For this layer I created a rule based symbolization, with 4 rules. In every rule I filter another roadclass and set a different symbolization and scale for this rule....
0
votes
0answers
40 views
Raster merge in QGIS deletes scale
I try to merge 2 raster tiffs in QGIS 3.10 (Raster-Miscellaneuous-Merge). The merge is executed but the resulting map is just black, the scale is set to 0, i.e. all the information of the rasters is ...
2
votes
2answers
177 views
Printing to scale in QGIS
I want to print a map to scale on 11x17 paper. I understand you can change the scale bar to 'numeric' in print composer, and then set the scale under properties for the map.
What I want to know is ...
1
vote
3answers
868 views
Export raster to PNG in 1:1 scale from QGIS?
The raster I have is 1m LiDAR data that's been patched and properly color corrected.
The resolution of it should already be 1m/pixel.
The coordinate system is properly set, the measure tool measures ...
-1
votes
1answer
49 views
Is climate a small-scale or large-scale process? [closed]
This might sound like a stupid question but it bothers me anyway:
We distinguish small-scale maps like world-maps and large-scale maps like a map of my local neighborhood. So far, so clear.
However, ...
1
vote
0answers
111 views
How to have the same scale for two maps? [closed]
I'm using QGIS 2.8.1. I have one raster map with rainfall data with 1:3 scale when zoomed to layer.
There's another vector map with points which in scale 1:221,691 when zoomed to layer.
Both are ...
7
votes
2answers
153 views
Access QGIS rendering map context within QGIS Python function
I maintain the maps for my local Nordic ski trails. Each winter during the 'Tour de Soup' skiers travel from one soup station to another with the aid of a special event map.
Because the map is ...
0
votes
0answers
135 views
QGIS 3.4 Layout manager, attribute table, scale of map
I am trying to produce maps faster than I currently do. I was thinking to use the "show only features visible within a map" option. I already use it for the coordinates table and I am trying to add ...
