Questions tagged [scale]

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

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14 views

Is there a way to get the scale of a map using gdalinfo? [on hold]

I'm completely new to GIS and using GDAL, and I was wondering if there was any way to extract the scale of a map, using information such as the Geo Transform, Corner Coordinates, WGS84 Extent, or ...
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26 views

Keep the same image scale after mosaicking

I am trying to keep the same original image scale after creating a mosaic with the same images. But when I try to add in a map this image I can´t configure the visualized parameters. The problem is ...
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12 views

How to Converting stream definition threshold to extract drainage network to metric scale?

I extracted two drainage networks from a DEM of 30 meters resolution with two stream definition thresholds: 1000 pixels and 500 pixels. Can you tell me what this thresholds represent in terms of ...
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1answer
43 views

Locating date, scale, and coordinate system of shapefile in ArcMap?

I am trying to locate the date, scale, and coordinate system/projection of a shapefile in ArcMap but when I right click on the file in the table of contents and go to properties, I don't see the date ...
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1answer
28 views

Increase max zoom for large scale raster with GeoServer

I'm serving a large scale raster (warehouse map) with GeoServer. I consume the WMS in a Leaflet web client and coordinates are projected according to EPSG:3857. But it seems that maximum zoom is ...
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48 views

Scaling WGS84 coordinates?

I know this is a weird question, but I would like to know if it is possible to construct a proj4 string so that I can use proj4 to convert from WGS84 to a "scaled" WGS84 system. For example with a ...
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1answer
51 views

Scale of shape in a Print Layout

I am making an atlas with a fixed scale, and want to include circles with a fixed radius (in scaled kilometers) about the center point in the atlas (see image below). I was able to do this by ...
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13 views

Creating Scale field based on polyline length (ArcMap)(Python)

I'm playing around with data driven pages, and have a polyline feature class that I'm using as my index. Now, because the lines are all of variable lengths I can't just use the default settings as ...
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1answer
91 views

What is WMTS' ScaleDenominator?

I am trying to write a program which will render tiles from EPSG2180-based WMTS server. Given coordinates of a point (WSG84 or EPSG2180, I can convert from one to another) I want to render a tile ...
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19 views

zoomScale() doesn't work in QGIS 2.14 standalone c++ application

Can't set scale for my canvas with mapCanvas.zoomScale(50000); Seems like canvas is zooming to 1:1 and for a few seconds I can't zoom in or zoom out with mouse wheel. Any suggestions?
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1answer
39 views

Adjust label/symbol size in print composer automatically when choosing different scale for atlas

I am having trouble with my labels/symbols in the print composer and didn't find a solution here so far. I have a project with a certain area from which I have to create several layouts in the print ...
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68 views

Understanding projection, extent and scale in QGIS?

I am creating a map using QGIS that has shapefiles in different projections. I was able to reproject them to the correct ESPG code that I need, however they do not line up. My base layer "illinois ...
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1answer
42 views

QGIS3 How to export shapefile symbology to scale?

I'm looking how to export in QGIS3 a vector layer with a determined scale. It was straightforward in QGIS2 when I was exporting to a shapefile I had the option symbology scale but it disapear in QGIS3 ...
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34 views

Interpreting meter values of extent using ArcGIS Pro?

I am using ArcGIS Pro application to create a map and add a single polygon feature class onto the map. As shown below, I use bold polyline to outline the boundary of the polygon and click "zoom to ...
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25 views

Raster Resolution - Will not display past certain scale

I just created a mosaic of a couple hundred digital elevation models in ArcGIS desktop. The mosaic only appears at the raster resolution. I am working with a very large area and need the scale of my ...
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1answer
258 views

QGIS 3.2 - How can I scale polygon about his center? [duplicate]

How can I scale a polygon about his center? I find only transform function, but the scale function here can only move the polygon with the scale factor and don't enlarge it.
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1answer
115 views

Scale bar for Iceland map not accurate

I'm a fairly new user to QGIS and was trying to generate a map of Iceland. However my grid scales are not matching up. The base map I'm using is Esri National Geographic which uses CRS- EPSG:3857 - ...
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38 views

Trying to figure out ArcGIS API's `mapScale` variable and how it maps to OpenStreetMap's zoom level

I'm using ArcGIS' /export endpoint to get an .svg of a few map layers given a specific bounding box. However, when I apply the .svg as an image overlay to OpenStreetMap's world map using Leaflet, the ...
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180 views

Print Openlayers WMS map with fixed scaling

I need to print a map with a fixed scale (1:500 and 1:1000) on A4. The online map is done with Openlayers, the print request is sent to QGIS Server using WMS getPrint function. I mange to get an ...
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1answer
90 views

QGIS Print composer using margin and scale

When using the Atlas feature in the print composer is there any way of using both the Margin around feature and a defined scale?
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37 views

AGOL: Overwrite existing tile service - Invalid min scale in the specified source item

I'm trying to automate updating a tile service where: TPK is generated from a feature class in an .mxd (data frame is web mercator) TPK is pushed up to AGOL Tile Service is published TPK is deleted ...
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156 views

QGIS 3.4 layout: fix extent and scale, let size adjust automatically

I'd like to create maps with a defined extent and scale. Logically, the map size has to adjust accordingly. Since I will be using the maps as pdfs (and not on paper), this won't bother me. Is this ...
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20 views

Creating more than one map page and breaking geometry representation based on max map scale in QGIS Atlas?

I am using atlas tool of QGIS. Map scales were defined for better fit in each geometry based on predefined values. I would like to know if there is a way to create a new map page and 'break' the ...
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1answer
96 views

Earth Engine export scale interpretation

I'm exporting a Landsat RGB image from Earth Engine. I want to use the full native resolution (30-m pixels) in the output file. However, it seems that using 30 in the scale argument fails to export at ...
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65 views

Changing legend spacing to be further away from map border in QGIS?

I am using QGIS 3.2.3 I am creating a map in which I have added a legend to (see figure below). My issue is that I am trying to create a legend which has spacing between the two columns. I have ...
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1answer
174 views

Scale issues with Google Roads XYZ tiles in QGIS layout

I am trying to include Google Roads as XYZ Tiles in QGIS in a map that I want to export as PDF as a Layout. Google roads features and the text looks ok on QGIS and in the Layout, however, after I ...
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54 views

Which is the View.getResolution() units? [duplicate]

In OpenLayers v5, if I have a view defined like this: var view = new View({ center: [952014.59, 5571269.68], zoom: 8 }); , trying to get its resolution doing view.getResolution() outputs 611....
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1answer
38 views

Appropriate resolution for regression analysis

I'm using ArcMap 10.3. I'm a student working on a research problem where I'm taking Landsat imagery (at 30-meters resolution) and regressing it against other datasets captured at different scales (up ...
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256 views

How to get extent from current resolution in OpenLayers 3 for printing

I need to print a map with a fixed scale of 1:500 horizontally on a A4 paper (297x210mm). The map is done with Openlayers, the print request is sent to QGIS server using WMS getPrint function. Till ...
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1answer
57 views

Can you make QGIS decorations scale dependent?

I have a QGIS project that includes a grid decoration. Is it possible to display this decoration only when zoomed in? I.e. can decorations in QGIS have scale dependent visibility?
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2answers
229 views

How to scale features declining using map units in QGIS

I have layer in QGIS that I want to style using SVG symbols. I want the SVGs to increase in size when zooming in the map. I can solve this by using map units instead of millimeters. Though, I don't ...
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60 views

WMS - understanding <Min> and <MaxScaleDenominator>

I am working on a personal web gis client and the first thing I am implementing is support for OGC WMS 1.3.0. Right now, I am in the middle of greying out layers in my layer tree which are not ...
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42 views

Assessing impact of spatial scale on derivative calculations and associated kernel size?

Full question: What is the most appropriate way to assess the impact of spatial scale on derivative calculations associated with typical 3x3 moving window kernel operations? This relates to a couple ...
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1answer
28 views

Custom Projection and Alignment of Large-Scale RGB Time Series Mosaics

We are running an experiment to observe time to germination and growth in potato plants in a greenhouse. To that end we have built a gantry system equipped with an RGB camera to capture the plants ...
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1answer
144 views

GeoServer - Conversion formula between scale and resolution

I am trying to figure out what is the conversion formula between scale and resolution used by GeoServer, specifically when creating a new gridset for Tile Caching. One would expect that the conversion ...
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1answer
317 views

Setting fixed scale of map in MapInfo layout?

How do I set the scale of a map in MapInfo v16 64bit in a simple way? I can zoom in and out using my mouse but I cannot find how to set the scale to say 1:1000 or 1:2000.
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99 views

Scale raster cell in stack from -1 to 1 with R [closed]

I have a raster stack with 364 layers with a daily rate of change in NDVI values. I want to scale these values in every cell if positive from 0 to 1 and if negative from -1 to 0. So far I have only ...
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2answers
42 views

How to maintain current zoom level when panning to a new feature? [duplicate]

I want to speed up my work. How could I get ArcMap to stay at my current zoom level when panning to a new feature? What I am currently doing is using Ctrl+Enter to move through my attribute table and ...
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1answer
493 views

Disappearing map image when georeferencing in ArcGIS 10.6 desktop

I am trying to add an un-georeferenced map into ArcMap as raster so that I can manually georeference it, then use it as a base to draw polygon features on top of it. I can add in the image and ...
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1answer
228 views

Generate grid for specific scale in QGIS

I have a rather large map that I want to break down into smaller parts, or sheets. So I'm going to use the 'atlas' feature of QGIS Print Layouts. My layers in QGIS have a CRS of GDA94 (degrees), where ...
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1answer
148 views

Why does gdalinfo -hist give values outside of [0 - 65535]?

I am running gdalinfo -hist on a 3 band tif file and am getting the following output (see below). Notice it says 256 buckets from -78 to 40184. That's fine, but then when it shows the histogram, ...
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1answer
63 views

MapProxy WMS Print Scale Problem

The application that I work with consumes WMS services created in Geoserver via MapProxy. I used ysld to style my layers. As long as I want just display my layers in the application, the scales that I ...
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1answer
87 views

Scaling layer symbols from ArcMap to QGIS

I am recreating the symbology of a cartography moving from ArcMAP to QGIS substituting some font symbols in arcmap and reproducing them with new .svg symbols. The problem is that setting the size of ...
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1answer
195 views

Set zoom level to display full extent of specific layer when starting a project in QGIS

I have project in QGIS 3.2 with different shapefiles and WMS layer. When I start the projectfile (.qgs) I want the extent of the map to be the same as one specific WMS layer (same as the option "zoom ...
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96 views

OpenLayers 2: zoomToExtent with scale

I need to zoom map to show some selected features from layer. So I am creating a temporary layer with features and zoom to this temporary layer. The problem - usually the scale is too small, so I ...
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161 views

How to get DPI to find current scale in OpenLayers?

Is there a way to automatically retrieve the DPI value of an OpenLayers page? The goal is to automatically retrieve the map scale from this code: function mapScale (dpi) { var unit = map....
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1answer
122 views

Fixing OpenStreetMap scale in MapInfo?

I have OpenStreetMap (OSM) in MapInfo and I would like to export a County but when I zoom out to view the county the map scale changes. Does anyone know how to set the scale of OSM so I can export it ...
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0answers
99 views

Can GDAL give the scale of a raster?

I have a GeoTIFF and I am trying to overlay a scale (miles or km) using GDAL. Is there a function in GDAL that will do this? I believe ArcPy has this functionality, but I am guessing GDAL does ...
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0answers
62 views

ol3 zoom with defined scale

I am trying to show map based on the gridset defined in geoserver, in such a manner that map zooms to that Scale only. Scale is as follow : 1:1000, 1:500, 1:400, 1:300 view = new ol.View({ ...
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0answers
53 views

Understanding scaling or projection with vector shapefiles which leads to 1:500,000,000,000? [closed]

I am conducting a habitat suitability analysis using ArcGIS desktop 10.2.2. I have a vector .shp of a number of georeferenced hare sightings across Ireland, however when I load the layer on to my map,...