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Questions tagged [scale]

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

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0answers
13 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 ...
-1
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0answers
28 views

Accurate Scale bar on Map composer [duplicate]

Hi am relatively new to QGIS (using V3.2). I am having issues when it comes to providing an accurate scale bar. I understand that different Coordinate reference systems are going to alter distance by ~...
1
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0answers
60 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 ...
3
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1answer
37 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?
2
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2answers
101 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 ...
1
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0answers
34 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 ...
2
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0answers
35 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 ...
0
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1answer
25 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 ...
1
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1answer
37 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 ...
1
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1answer
57 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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0answers
46 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 ...
-1
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2answers
36 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 ...
1
vote
1answer
127 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 ...
0
votes
1answer
56 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 ...
0
votes
1answer
39 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, ...
1
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1answer
27 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 ...
1
vote
1answer
50 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 ...
1
vote
1answer
80 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 ...
0
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0answers
21 views

Is there a way to add a coordinate scale to the sides of a Google Earth map?

I'm making a map using Google Earth and I want the sides of the map to have a ticker/scale that shows the coordinates at each tick. Is there a way to do this?
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0answers
21 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 ...
0
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0answers
37 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....
0
votes
0answers
32 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 ...
1
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0answers
45 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
52 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,...
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0answers
49 views

Getting wrong scale on georeferenced TIFF in QGIS?

I just georeferenced a map of Iceland using the ISN93 coordinate system. It looks like it was successful since when I transform some random coordinates to WGS84 and compare them to Google Maps it does ...
1
vote
1answer
78 views

Printed map has different scales for raster and vector layers in QGIS?

I am trying to help a friend in another part of the country diagnose this problem. She has a background layer from google and has a vector layer overlaid on it. It looks fine in the composer but ...
0
votes
0answers
111 views

How zoom base on scale in ol?

I want to zoom to ol3 map base on scale(for example 1:50000). This means every 1cm in ol map must show 50000cm in real world. for converting scale to resolution I used as follows: var ...
1
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0answers
69 views

Invert the legend scale representation [in R environment]

Through the following code, cols <- (heat.colors(255)) plot(raster_sum3, col=cols[round(seq(1,255,length.out=10))], legend=TRUE) # raster of the study area plot(site_3003, add=TRUE) # site ...
1
vote
1answer
97 views

Group scale-based visibility QGIS 3

Is it possible to set scale-based visibility for groups or sub-groups of layers in QGIS 3?
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0answers
20 views

The scale of Landsat 7 8-Day NDVI Composite

I have found Landsat 7 8-Day NDVI Composite dataset(LANDSAT/LE7_L1T_8DAY_NDVI) in Google Earth Engine,but I can't find the scale of it.So what is the scale of Landsat 7 8-Day NDVI Composite dataset?
2
votes
0answers
98 views

draw map scale in geopandas

Is there a geopandas version of basemap's m.drawmapscale function? If not, can I somehow utilize basemap's drawmapscale function within geopandas?
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0answers
36 views

Polygon Object Label Visibility on GeoServer

There are too many polygon objects in this layer. I want to filter out these objects. At the same time, I used point symbols instead of polygons at different scales. But the labels only appear in the ...
0
votes
1answer
33 views

Geoserver WMS limiting map visibility by scale

In ArcGIS I can manually limit visibility of a map layer by specifying a min and max scale (see below). Is it possible to instead set this server-side on Geoserver? I've seen something similar in ...
0
votes
0answers
72 views

Import Illustrator/Inkscape svg into qgis

I tried to import lines from svg into qgis 3.x by using dxf format. The problem is that the scale of dxf is of course not the right one (a few centimeters whereas my map is kilometers long). I tried ...
1
vote
1answer
79 views

Setting up Print Composer to Output Paper Map at Right Scale in QGIS?

How does one set up print composer to output a real world map paper map that is scaled properly so that a manual (real world) scale rule that one places on a paper map is scaled properly in a scale ...
1
vote
1answer
38 views

Editing OpenLayers viewer in GeoServer?

I would like to custumize the openlayer3 viewer integrated in the Geoserver (2.13) to have more zoom levels (by default there are 28 zoom levels with a zoom factor of 2). In other words, I would like ...
0
votes
0answers
72 views

OpenLayers, WMS MinScaleDenominator and MaxScaleDenominator

In my OpenLayers map application I display many WMS layers from different sources. Some of them have display scale restrictions set by MinScaleDenominator and MaxScaleDenominator tags in WMS ...
2
votes
1answer
122 views

Colour Scale Bar for One-Band Rasters Error

I have a vector layer of a map with a number of regions. I have coloured those regions using a gradient blue colour. I would like to create a colour scale bar for this map. I downloaded the Colour ...
0
votes
1answer
153 views

Interpreting scale in Google Earth Engine (using Hansen data)?

I previously posted about this same problem as Iterating over years for features in feature collection using Google Earth Engine? I realized recently that the results that I was getting based on the ...
0
votes
1answer
19 views

Display symbology categories at certain scales with ArcGis Pro

We can since a long time display layers at certain scales but is it possible to display a specific symbology categories at certain scales ? For example if I have the following feature layer: Can I ...
4
votes
0answers
51 views

ArcObjects modify Map Scale

I'm trying to modify the scale of the map so I can further export to pdf. The mxd document has a fixed map scale option set. The initial value is 250 and final is still 250 unchanged. The code looks ...
3
votes
2answers
44 views

Atlas Scale Focus off

I tried to manually set different scales for different features in atlas generation (QGIS 2.18.16). Thus, I had to switch off map - "controlled via atlas". The resulting scales were fine, however ...
1
vote
2answers
48 views

Issue viewing OS OnDemand layers at certain scale ranges?

I am having some difficulties viewing OS OnDemand WMS layers at certain Scales. For example, I have loaded the OS MiniScale layer which should be view-able between 1:236250 and 1:944928. However, if I ...
2
votes
1answer
246 views

Make the QGIS Print Composer take WMS maps from a specific zoom level - .png AND georeferenced image

I want to create a .png print with a world projection file from a specific WMS. The WMS in question is Polish national Geoportal service containing hypsometric data. Here's the WMS adress: http://mapy....
1
vote
1answer
46 views

Map scale will only double and halve in QGIS [duplicate]

When I zoom in or out in QGIS, my scale will only halve or double respectively. This is the case whether I manually type the scale into the window at the bottom of the screen or select one of the set ...
1
vote
1answer
62 views

Keeping certain scale of OS layers while zooming

On QGIS I have a WMS OS Premium Raster layer supplied by an external company. As I zoom in and out (i.e. change scale), the map changes to reflect the different OS map scales. How can I stop this ...
1
vote
0answers
50 views

Conflicting scale in layouts between AutoCAD and QGIS?

I have a recurrent problem. Whenever I import data from AutoCAD (through dxf, properly referenced) into QGIS and then compose a layout at the same scale as the layout I had in AutoCAD, they appear to ...
1
vote
1answer
142 views

Setting predefined scale in QGIS Atlas [closed]

I want to generate an Atlas in QGIS using a fixed scale of 1:750 on each page. I am using a point file to define page location centers. Both 'Margin around feature' and 'Predefined scale (best fit)' ...
3
votes
1answer
148 views

Display numeric scale in two different units, eg 1 inch = 1000 feet

How do I display a numeric scale for a map in two units, for example 1 in = 1000 ft ? I know it's possible to display a scale bar as "Numeric," which provides only a ratio, in this example 1:12,000. ...
0
votes
1answer
113 views

Printing maps at a specific scale using the print composer (1"=2000')

I have created my map for land planning and set up my sheet to be exported in the print composer, but I'm confused when it comes to printing at a certain scale. I see within the item properties > main ...