Questions tagged [scale]

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

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38 views

Spacing error when creating vector grid in QGIS

I'm trying to create a vector grid in relation to a commune's right-of-way with the "create a grid" tool in QGIS 3.16. I would like the grid to be created at a certain scale. In the tool ...
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1answer
68 views

Removing symbols from area that is also shown on inset map with QGIS

I have a layer with locations. I want to display this on a layout that has a map at a small scale (main map) and an inset map at a bigger scale. I do not want to show on the main map the symbols that ...
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55 views

Adding scaled location labels in QGIS

I currently am working on creating a choropleth map of population redistribution data, and would like to stack three layers on top of each other. First, a simple basemap-- I chose to use a Cartro ...
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36 views

QGIS zoom to predefined scale with mouse wheel

Do you know if it is possible to set QGIS to zoom to the predefined scales (in project options) when using the mouse wheel ?
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1answer
26 views

Is there a way to scale all polygons up or down?

I am looking for a way to take a layer and effectively scale and translate all the vector polygons. Specifically, I am trying to make a miniature map of North American States and Provinces that will ...
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1answer
27 views

Layout Automate map scale

the following code automates the project CRS for display as text in my maps. [% @project_crs %] Can anyone provide me with something which will automate the scale of the map?
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1answer
111 views

Finding scale of map in QGIS

In QGIS I want to know how can I find the scale of a map. I have state boundaries with me, and when I calculate the length of the boundary, it comes out to be something like 245.854. This most ...
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10 views

MODIS temperature LST

I am trying to implement a code that I found online where they are trying to extract temperature images changing them to array and combine them with reflectance. But I couldn't understand this part of ...
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1answer
66 views

QGIS Atlas fit center map to another table

In QGIS Atlas, I manage two tables. One regarding buildings sector with its own geometry at sector level. The other regarding buildings. Both tables are related by sector code. I need one map per ...
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30 views

QGIS DXF export problem

I have a problem exporting a layer into DXF format where when the DXF is opened in QCAD the scale is about 1:100,000,000 and when I scale it to correct size, the x and y scales are not the same. For ...
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69 views

GeoServer wind speed with WMS

I have a GeoTIFF layer with spatial resolution of 3 km with two bands with wind speed components (u,v). I want to display these datasets with RasterAsPointCollection plugin with arrows size and ...
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17 views

Drawing polygon in ArcGIS Pro not scaling up

I am drawing some street polygons on ArcGIS Pro, when I zoom out while creating a feature, the line is not scaling up. My coordinates are set to UTM, the same with my new feature. Any hint on to fix ...
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13 views

Scale dependent Pop-up, Is Arcade the answer?

Is there a way (possibly through an Arcade Expression) to control ArcGIS Online Pop-up visibility based on scale? For example, I only want the Pop-up to be available when the user is zoomed in to a ...
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1answer
69 views

Is there a way on Atlas to put a Margin around feature but also use Predefined scales?

In QGIS, how can I put a margin around a feature but also use predefined scales in Atlas? Like an in-between of the two options. I have a feature that fits in the map but as you can see in the image ...
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18 views

QGIS not opening NetCDF File correctly

I am trying to add a NetCDF file of sea ice age into QGIS (have tried by raster, drop and drop, mesh), the .nc file contains the sea ice age, latitude and longitude. When I by adding by raster it asks ...
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1answer
48 views

In Atlas how can I put a margin around a feature but also use predefined scales

In QGIS, how can I put a margin around a feature but also use predefined scales in Atlas? I have a feature that fits in the map but very tightly, so I would like QGIS to use a smaller scale to better ...
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1answer
52 views

QGIS scalebar shows circa half the distance of what I measure

I'm using QGIS3.16.13 and when I add the scale-bar from "view > Decorations > Scalebar" to my map I noticed that it shows the wrong distance. I'm not talking about the print-composer, ...
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17 views

Cannot draw map at high scale

In Arcmap 10.8, I am attempting to draw an orthophoto and several polygons at a high scale (not lower than 1:6000). However, Arcmap simply refuses to draw any layers unless I have a spatial resolution ...
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41 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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1answer
34 views

What does the “scale” setting when plotting a NDVI or EVI time series?

I adapted the script from the guide for ui.Chart.image.series to my region of interest and time period: // Import the example feature collection and subset the forest feature. var bm = ee....
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40 views

Resolution of results exported from Google Earth Engine

I use this code to export my classification result from Sentinel2 images in GEE: // Export the results to Drive Export.image.toDrive({ image: result, description: 'Unsupervised Classified Image', ...
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1answer
62 views

WMS map is blank and scale has weird values

Why does a WMS GetCapabilities has different scale values according to version response for the same map? And the map visible scale is yet different on GetMap requests? For example in WMS server hydro....
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20 views

Wrong scale on printed PDF on Mapfish print

I have a problem with printing layers on concrete scale. For example, I send request as below: { "layout":"A4 portrait", "outputFormat":"pdf", "...
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1answer
39 views

Overview map not syncing with main map

I have created an overview map widget for my web app using arcGIS API for Javascript version 4.17. My overview map is separate from my main map as I don't want to bring in all the layers from my main ...
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1answer
40 views

Choosing right scale for global aggregations in GEE

What is a correct scale to aggregate global datasets like VIIRS Nighttime Lights in GEE, a scale that will retain maximum (original) amount of information when aggregating over any place in the world (...
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41 views

Zoomscale method in QGIS C++ API

I am working on a custom QGIS application using QGIS C++ APIs. I am able to render .mbtiles file of world blue marble as a raster file on Qgsmapcanvas. but when I call zoomscale API on canvas with ...
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1answer
30 views

Using scale range in ArcMap

I am using ArcMap 10.8. I add the UAV data for raster data(.tif). But in my display, the data only display a particular scale(1:600). I checked my scale range. But also set "show layer at all ...
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2answers
32 views

QGIS 3.16 - I want to make by 6“x9” map a 24x36, but all of the text/layers are tiny. Is it possible to automatically scale all of the layers?

I recently got a freelancing gig and am really excited, but I'm having troubles exporting my map in a different size in QGIS. My client wants a map sized 24"x36", and I have created one that'...
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19 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
37 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
141 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
59 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
50 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
86 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
123 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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36 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
34 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
77 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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0answers
23 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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0answers
24 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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0answers
61 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
32 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
34 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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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 ...
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2answers
202 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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85 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
123 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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0answers
127 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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