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

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1answer
19 views

Calculating scale for printing on paper

I will be making PDFs with maps on them. Two pages, one a4, one a3 format. Both will print the same thing, just one is going to be larger. Question - what scale do I print on the PDF? The number. If ...
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15 views

Scaling distance by area

For each administrative unit, I calculate the median distance between businesses. However, for larger unit, this distance is naturally bigger (and does not paints a fair picture of, say, the effort by ...
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1answer
62 views

How to calculate a map scale with bounding box, width and height?

I have a map that will allow the user to select or slice images/pictures out of it. As example a map width is 1200px * 1200px and the user selects say 700px x 700px square (note: aspect ratio is ...
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0answers
30 views

Why did the USGS use 1:24,000 scale for their large scale topo maps?

I can't find any particular reason this scale was used for most of their 7.5 minute large scale topo maps. At 1:24000 1"=2000' and 1cm=240m and the area per map varies between 49 and 70 square miles, ...
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0answers
20 views

QGIS: layer scale visibility

I need to display a line-type layer differently according to scale. Do I necessarily have to use a rule-based representation and make several different rules (one per scale interval) or is it possible ...
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0answers
42 views

Digitizing scale when digitizing from Bing imagery service in QGIS

I need to digitize a bunch of islands from imagery in QGIS. It is the Bing Maps aerial imagery layer. I will obtain all required permissions. My plan is to lock the map scale at 1:25,000 and use heads ...
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0answers
26 views

OpenLayers Layer.Vector with external graphic image overlay - scale help

I have this image overlay that has a lot of dynamic features associated with it, which are coming from a JSON file that's updated regularly with live data. I believe I need to use the Layer.Vector ...
1
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1answer
51 views

Merging two polygon layers with one layer having priority over the other

How do I merge two polygon layers? One is coarse scale over a large area (land use). The other is fine scale but is patchy (agricultural fields) in extent. I want the same extent of the land use layer ...
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0answers
12 views

different zoom level for same shapefile arcmap [duplicate]

I have a road Shapefile in ArcMap which includes three different type of roads highway, motorway, streets. I want to display all these roads at different scale. One way to do this is to create three ...
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0answers
29 views

Scale Selection Symbols with Reference Scale using ArcGIS Engine?

With an ArcGIS Engine application, I am trying to figure out how to have the Selected Symbols scale with reference scale when selected using ArcObjects. They are currently not scaling correctly in ...
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0answers
13 views

Cached services appear at all scales but not limited to the cache scales

Cached services appear at all scales but not limited to the cache scales Can anyone give an explanation why the Cached services appear at all scales but not limited to the cache scales, for example I ...
1
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1answer
63 views

Digitized Map To Scale

Is it perfectly acceptable to produce a map at a scale of 1:24,000 from a database that was digitized from a 1:100,000 scale source map?
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1answer
11 views

Scale and density values in density map appear wrong when in projected coordinate system?

I'm making a series of maps illustrating different aspects (road density, location of dams, elevation etc...) of a single watershed in California. In most of my maps, I've had the projection set to ...
4
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1answer
71 views

Is there a way to change the scale bar interval and other settings on individual Data-Driven Pages?

Sometimes I'll have a MXD set up as a mapbook using Data Driven Pages, but I'd like to display certain pages at a different scale than others in the same mapbook. I can do that using the Data Driven ...
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0answers
17 views

ETRS89-LCC true scale

With QGis 2.12.0 I made a map with the "EPSG 3034 ETRS89-LCC" I then modified the parallels of latitude with custom ones by the rule of 2:6, so from: +proj=lcc +lat_1=35 +lat_2=65 +lat_0=52 +lon_0=10 ...
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0answers
23 views

QGIS Data Frame scale

I am trying to setup the Data Frame in QGIS to a minimum scale of 1:0 like ArcMap does. Zooming in goes down to 25.000:1 Any suggestions? Thanks
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0answers
16 views

How to create a coverage layer (low overlap & fix scale)

I'm preparing a coverage layer from a linear SHP ( a pipe of 300 km). I use the tool "v.split.length" to cut the original SHP into several sections. In the box "maximum segment length" I manually ...
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0answers
12 views

Features becomes bigger on zooming in Openlayers 2.13

i'm new in developing Openlayers applications.I want to add Points and LinearRing objects to the same layer. My Problem is, when I add a LinearRing and I am zomming in, the geometry gets bigger and ...
1
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1answer
40 views

stack 10 modis ndvi geotiffs and scale them by 0.0001

I have 10 geotiffs Modis ndvi named 2005.tif ... 2014.tif I want to stack them all and create timeseries. i know how to do that, but the stacked images still need scaling by 0.0001. how can i bulk ...
0
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1answer
37 views

Frames from CAD to frames in Qgis

I'm trying to use some frames from Autocad (DXF / DWG) as a frame in Qgis (*.qpt??) but I don't know how to do it or if it's possible.
1
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0answers
29 views

QGIS Units and Scale

I am exploring QGIS 2.10.1-Pisa for the first time. I'm familiar with ArcMap, but I need to explore QGIS as an alternative. I am having a hard time trying to figure out the units and scale situation. ...
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0answers
68 views

QGis / Scale & scalebar wrong [closed]

First, I would like to apologize for the mistakes. My English is not very good. I read a lot but I don´t find the answer. I'm trying to put a scalebar in a very simple map but the measurement is not ...
0
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1answer
132 views

Zoom Scale in OpenLayers 3

Need to change the default zoom of OpenLayers 3 to do so adapted scales, type [1: 100000, 1: 50000.1: 25000.1: 10000.1: 1000.1: 500] have seen in Openlayers2 if you can, but at 3 I have not found a ...
1
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1answer
28 views

QGIS Labeling OSM items depending on scale

I'm working with OSM data in QGIS 2.10 (Ubuntu). I'd like to label items depending on scale. What I mean to do is to have only labels of "primary" roads from a scale of 1:80.000 down to 1:50:000 all ...
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0answers
38 views

Leaflet.js setBounds, scaling

I'm using leaflet.js to create a map of Scotland, with two insets for the Orkney and Shetland groups of islands. This is as far as I've got. I wish to guarantte that no matter what size the overall ...
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1answer
49 views

Setting up Hot Key to zoom to Map Scale?

I'm wondering if I can set up a hot key to zoom to 1:4500 whenever I use it. Also if I can set up a hot key to zoom in to 1:1250. I have these two extents set up in the custom extent area and when ...
3
votes
1answer
85 views

How to automatically assign current map scale to a shape created in QGIS?

In QGIS, would it be possible to automatically assign the current map scale to a feature created during an edit session and save it into a field in the attribute table? I have a series of OS maps of ...
0
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1answer
205 views

Geoserver SLD for min-max scale range display

I am new to Geoserver, so this is potentially very simple. I am trying to add a scale range to a layer that I am serving as a WMS. I want the layer to only be displayed between 1:30,000 and ...
1
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1answer
147 views

Checking layers with scale based visibility for visibility in QGIS

I am writing a Python method which I want the mouse click event to connect to. The method selects objects from layers that satisfy certain conditions. I want to select from any visible layer, that has ...
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0answers
46 views

Drawing Google Map & printing at 1:160 (N Scale for modeling)?

I would like to draw a Google Map between two cities crossing a mountain pass in the Western USA. That part I can do just fine. What I would then like to do is print it at the scale (am I using that ...
1
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0answers
12 views

Loading Shapefile with Work Network creating Negative Scale

For the company I work for, we have our own servers and network we load upon start up to do our work within QGIS. However its about 50/50 when loading an outside shapefile that it works. When I load ...
1
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2answers
112 views

Can TextSymbolizer font size be set as a function of the scale?

The standard behaviour when rendering WMS layers is to keep the text size across all scales and then filter out colliding labels so that the text remains readable, although delivering incomplete ...
0
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1answer
70 views

Creating polygon grid using fixed extent

I have a Shapefile of a town. I would like to divide the whole area into grids such that each grid has a scale of 1:2000. I have set my map to fixed scale (1:2000) in Layout View.
0
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1answer
86 views

Divide into grid and Mosaic using google earth?

Is it possible to download 1:2000 scale of a town using google earth image? If divide the whole area into grid and mosaic them is an option, how it is done using google earth? I tried using grid. But ...
3
votes
0answers
62 views

Printing a 1" scale from 2.8.2 Print Composer

I'm working on a small-scale site survey in qGIS, and for engineering purposes I need to print physical copies of the map that can be used with an engineering ruler. Basically, I need a way to print ...
0
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1answer
49 views

NHD layers won't redraw in ArcGIS 10.1 at small scale?

If I am already zoomed in to a smaller scale and then add the NHD Hydrography dataset (already clipped to just Texas), I can see all the NHDFlowlines, NHDAreas, and other layers that come in the ...
2
votes
2answers
100 views

When does a local system introduce errors in a map due to the earth's curvature?

If the extent of a map is very small, like a building plan, there is no coordinate reference system used. To which scale/size of building is that acceptable? Of course it depends on the precision ...
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0answers
67 views

Leaflet control to display scale in native/declared CRS (i.e. degrees)

I'd like to have a Leaflet map display the scale of a layer in native coordinates (i.e. degrees in EPSG:4326). From what I have read so far the map control always handles meters; is there a way to ...
1
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0answers
18 views

Creating Concentric circles using the ggmap function from GGMAP package R [duplicate]

I would like to create two concentric circles using the ggmap package and ggmap function, one being 1/4 mile and the other 1 mile radius around the 16 metro rail stations in Los Angeles California. It ...
0
votes
1answer
82 views

Area and distance calculation/measurement unexpected after projecting? [duplicate]

I have converted a GIS shapefile of Botswana from the geographic coordinate system GCS_WGS_1984 to the projected coordinate system Africa_Albers_Equal_Area_Conic to be able to calculate the area of ...
0
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0answers
39 views

Rules for scale specific layer style in GeoServer

I've got a very large polygon land cover map (millions of polygons) over a large area. Our first try at serving the data through GeoServer WMS was not very successful due to the large amount of small ...
1
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1answer
38 views

Is it possible to display irregular values in the scale bar in QGIS 2.8?

Is it possible to display irregular - increasing values in scale bar in print composer? For example: 5, 20, 100, 250.
3
votes
1answer
187 views

Set scale dependant labels arcmap 10.3

I am wondering if it is possible to create scaled labels so that at a certain zoom level only one label appears but when you zoom in closer more labels appear for different fields. I have this ...
1
vote
2answers
130 views

Since upgrading to ArcGIS 10, my application doesn't rescale the map when the window is resized

I am upgrading a .NET application from ArcGIS 9.3 to ArcGIS 10.3. I've noticed that the map control behaves differently: the map no longer automatically rescales itself when the window is resized. To ...
1
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0answers
59 views

Set Layer Scale Range Still Draws When Layer is Grayed Out In TOC? ArcGIS 10.2

I have a layer which I have set the visible 'Scale Range' to don't show layer when zoomed out beyond: 1:18,489,298 and in beyond 1:9,244,6249. (I am using ArcgGIS Online/Bing Maps/Google Maps ...
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0answers
16 views

Adding active content to the Atlas in composer $scale

I have an Atlas of 178 pages that centers on different size villages, its all well organised through the composer and all works well. However, I can't use the scale bar as the differences between ...
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0answers
19 views

how to set default scale for ecw in geoserver stores?

I added an ECW that it's default scale is 1:1,000,000 to stores of geoserver, and then went to Layer preview panel and clicked on the link to see the preview of map. But when the preview appears in ...
2
votes
2answers
450 views

Calculate scale of a raster

A raster has a cell size of 200 meters. What is the corresponding scale of the raster? New to GIS, using ESRI, semester is almost over but this one question is confusing. I didn't think you could ...
2
votes
0answers
127 views

Different scale of basemap after exporting to PDF/Image

After creating and exporting my map to pdf/tif obviously there are different scales of the basemap in the exported file compared to the map I created in the printcomposer. See pictures... I am using ...
0
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0answers
38 views

Disabling Extent Based Rendering using ESRI Javascript API

I am using ESRI's javascript API to generate a heatmap renderer for my feature layer. I am noticing that the heatmap calculation/visualization is dependent upon what is in the current zoom extent. For ...