Questions tagged [scale]

The ratio between distances on a map and distances in the world

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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 ...
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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 "...
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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....
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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 ...
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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/...
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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.
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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 ...
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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), ...
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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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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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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 ...
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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 (...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 = ...
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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. ...
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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 ...
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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 ...
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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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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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....
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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 ...

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