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

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1
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0answers
26 views

QGIS symbols using “advanced — size scale field” aborts rendering if encounters negative [closed]

Not sure if this is new in QGIS 2.6 Brighton, but I was struggling to get my points (small area centroids) to properly scale in size based on attribute values (population growth). Only a few dots ...
1
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2answers
37 views

Worldwide High-Resolution Water Body Shapefiles with Consistent Scale

Where from your website can I access worldwide vector water body shapefiles that have better resolution than the generic SRTM 90m data? Do you have coastlines and inland features (lakes, estuaries, ...
2
votes
0answers
33 views

How can I manipulate the number of points visible according to scale?

I've gotten trillions of points extracted from a DEM and they are to be labelled. It's fine at scales such as 1:500 but it gets too cluttered especially if I need to make maps of this with scales up ...
1
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1answer
59 views

QGIS Web Client zoom and scale

I have a problem with setting up zoom levels and max/min scale in QGIS web client. It looks like that values used in GlobalOptions.js file does not apply. Right now ZOOM_LEVELS is 70, maxScale 50 and ...
1
vote
2answers
66 views

Measuring tool shows different measurements for same building in two different map documents?

So I have two map documents with two different Coordinate Systems set for the layers but using copies of the same shapefile. Map 1: Coordinate System: ...
1
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0answers
44 views

ArcGIS SDK for .Net (used in WPF): update map's zoom parameters after changing base layer

I'm having the following issue: Suppose I have a Map object and 2 base layers (a world map and a street map). A world map doesn't let us view the map too closely. The street map allows us to view as ...
1
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1answer
28 views

Dynamic scale dependency from attribute query using ArcGIS for Desktop?

If I have a feature class called roads with an attribute for type e.g. highway etc. Is there a way to setup a dynamic scale dependency on the layer based on the type of road? Like do a SQL query ...
1
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0answers
12 views

Restrict the scale of the search widget in ArcGIS Flex API

I wonder if I could restrict the scale scope only for the searching widget (and not the extent of the map)? We want to narrow down the scale for searching in order to avoid too many results which may ...
9
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0answers
154 views

How do ESRI and QGIS calculate scale values of geographic projections? [closed]

Does anyone know how (from which location) scale values are calculated in ESRI products and QGIS for geographic projections? The only thing I've noticed is that QGIS is changing scales when you pan ...
4
votes
2answers
99 views

The scale in Qgis is not setting to feet

I am working in QGIS 2.4. I have changed the CRS of all the layers and in the project properties to EPSG:102739 - NAD_1983_StatePlane_Texas_Central_FIPS_4203_Feet. I am in print composer trying to ...
1
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0answers
24 views

Annotation/Label size adjusting to map scale in QGIS

I'm trying to label the street names for a map I'm working on but I do not want the labels to automatically adjust to the map scale when zooming in or out. My question is: In QGIS how do I set a fixed ...
1
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1answer
99 views

Printing map to scale

How to print this map (page) to 1:500 without georeferencing or without using any gis software. It is better to say that the marked line of 3 km should be 6 cm on paper (A4). See image:
1
vote
3answers
42 views

Scaling Items in the Legend [duplicate]

I am using ArcGIS 10.1. I inserted a legend however the items in the legend are too large because of the size i set them in the data view. How do i scale the items in the legend so they will be the ...
1
vote
0answers
26 views

Scale on map requires correction coefficient. But why?

I am computing the distance of a map I am getting from ArcGIS' REST services by using a calculator as provided by this answer. In a nutshell, it uses a GeodeticCalculator for distance computation ...
1
vote
1answer
69 views

Shapefile not projecting correctly [duplicate]

I am still new to this, so I apologise if I don't make a lot of sense! I am using QGIS 2.4.0 Chugiak. I am working on a project set to the GDA94/MGA Zone 50 coordinate system with 'on the fly ...
1
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1answer
35 views

Calculate geographic size in meters given lower left coordinate and upper right coordinate

How do you find the geographic size in meters given a lower left coordinate and upper right coordinate. The projection would be WGS84 projection. Ex. 33,-119,35,-117. What would be the area in meters ...
2
votes
1answer
295 views

How to calculate pixels per meter ratio, according to Google or Bing map zoom level?

I have an image and detect two points in the image. I want to calculate the distance between these two points. I'm using Google map and Bing map. I have x,y pixel values for both two points zoom ...
2
votes
0answers
42 views

Choosing the map scale (1:nnn) for the given raster dimension

Starting points: let define the raster image size, say: 1800x900 pixels I want draw my own raster image map - by drawing polygons e.g. like "draw line from pixel with coordinates x100y100 to pixel ...
1
vote
1answer
58 views

Why are my points being flipped or mirrored when I convert from DMS to DD?

I have a collection of crash data that provides latitude and longitude in degrees, minutes, and seconds that I'm converting to decimal degrees using: (degrees + (minutes/60.0) + (seconds/3600.0)) ...
0
votes
0answers
41 views

Scale keeps changing in QGIS composer?

Every time I pan the map content in the QGIS composer window the scale changes. Is there a way to make it stick at specific scale?
0
votes
0answers
39 views

Enlarge region/features in shape file

I'm completely new to QGIS. I have a shape file over the counties in Denmark (see here for what the shape file looks like). The counties around Copenhagen are rather small and I'd like to add an ...
0
votes
1answer
64 views

problem in scale of projected raster

I have a shapefile (my basin limit) and one raster file that I projected it to the shapefile coordinate system and set its cell size to 1000m(area=1Km2). my basin area is 5400 Km2 and it should ...
0
votes
0answers
35 views

How specify QGIS scale settings according to project?

I have a layer in QGIS named rivers. I want to view this layer between 1/5000 and 1/400.000 scale. But when I open QGIS, I see the default scale is 1:-2.147.483.648 I setted the project scales from ...
1
vote
1answer
82 views

Why is the scale on my maps a bit too big?

I saved couple of pdfs when I relized that the scale I set is not the scale that shows, everything is a bit bigger. I tried to check it not only at the print composer, but in the "work space" and it ...
1
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0answers
51 views

Web site for plan upload and measure

I've got plans of my house and a warehouse on paper. I would like to scan them in JPEG, import them on my PC and measure them. I'm looking for a website where I can upload those tiff, jpeg or pdf ...
0
votes
0answers
15 views

OSM exports at different scale to what is on screen

I am using ArcGIS 9.3.1 I have added OSM as a WMS layer. I have a map set up how I want it to look in the layout view. When I go to export the map, whether as an image file, or in AI, which is the ...
0
votes
2answers
107 views

Defining a scale number from the Helmert transformation

I know this is more bit of a cartographic issue, but maybe somebody would be able to help. I have an old map georeferenced to the openstreetmap with 50 identical points. I want to get the scale of the ...
2
votes
2answers
153 views

Scale and Z factor have no effect on hillshade analysis in QGIS

I used an SRTM DEM to create a hillshade in QGIS 2.2.0. However, the resultant hillshade seems to be vertically exaggerated. Also, changing the settings for scale and z-factor does not have any effect ...
0
votes
0answers
68 views

qgis html annotation does not respect 'Lock layers for map item' in print composer

In the QGIS 2.2 map composer, html annotation objects do not seem to respect the 'Lock layers for map item' checkbox. Unless an explanation / solution surfaces, I think this is a qgis bug and I'll ...
1
vote
0answers
119 views

qgis html annotation - scale dependent rendering?

In the QGIS 2.2 map composer, I have a large map at a certain scale (let's say 1:25000) and an inset map that is an enlargement of part of the main map (let's say 1:12500). When adding html ...
2
votes
0answers
97 views

Mapfish printing application from Openlayers : disableScaleLocking

Mapfish printing application from Openlayers: I get the following error when I use a different scale than the scales defined in the config.yaml even though I am using disableScaleLocking: true ...
2
votes
1answer
125 views

Why are map scales not used instead of Zoom-levels in web mapping clients such as OSM or Google Maps?

Google Maps and OpenstreetMap and many other web mapping products utilize the concept of zoom-levels to change the size of the map in a web client. Most people are however more familiar with the ...
1
vote
0answers
87 views

Maximum scale dependent visibility changes from 1:0 to -2147483648:1

QGIS 2.0.1 Dufour. When i open the layer properties and the scale dependent visibility is unchecked and when i check it, the maximum (inclusive) shows 1:0. I click Apply, OK, reopen layer properties ...
0
votes
2answers
260 views

How to set map scale using Arcgis silverlight Api?

I want to set map scale manualy using ArcGIS Silverlight Api . I use silverlight api 3 and arcgis server 10 . I have 4 scale levels and I want to show the map in these scales. How can i set these ...
1
vote
1answer
181 views

Map scale vs. map extent vs. map canvas size in Print Map Composer

Please help! I am so beyond frustrated. I am using QGIS 2.0 and when I try to create my map in the print composer, I cannot make the scale and the extent the way that I need it. I need my map to be ...
2
votes
1answer
131 views

How can I set a specific meter scale in the print map composer?

I am making a map for an orienteering class at the environmental education center that I work at. In order for us to easily calculate the distance between orienteering points, I need the scale to be ...
0
votes
0answers
38 views

How to get tiff file of project limits at specific scale using QGIS 2.0?

I have shapefile which has a layer extent scale of 1:551920. I want the TIF file exports of the file at a scale of 1:200000. Is there way to do it automatically? Or do I have to do it manually by ...
0
votes
0answers
37 views

QGIS pixel/square cms using scale, dpi

The data (vectors) I'm using are 5cm in resolution. I think that resolution refers to accuracy of the data and not the image resolution. I've produced maps using the QGIS print composer and exported ...
0
votes
1answer
294 views

How to add Map Legend, Scale Bar and Select tool to an ArcGIS Server Service?

I have published a service from ArcMap to my Server Account but I can't figure out how to add the legend, scale bar and select tool to the service. According to the published service it was built ...
0
votes
1answer
227 views

Error in raster displays of NoData cells when “zoomed in” past scale 1:3,000,000

I looked around GIS stack exchange and ArcGIS Help pages and didn't find anything on this issue. I have encountered an error in how Arc displays a Raster file (.TIF format) at different scales. At ...
1
vote
1answer
120 views

How to calculate size of a pixel for a scanned map?

A land use map has a scale of 1:150000. The map is scanned at a resolution of 150 DPI. What will be the surface area in m square represented by each pixel in the resulting easter map?
3
votes
3answers
74 views

How do I create a map that is not to scale in QGIS?

I want to make a map that isn't to scale and I'm so used to being pedantic about CRS and scale that I don't know where to start. The map that I need to make is a simple guide for people to get to a ...
4
votes
2answers
92 views

Measuring scale for small scale maps

A cartography question: you open an atlas and usually at the beginning of it there are some world maps showing various thematics. Let's say the world map uses Robinson projection and it says it has a ...
2
votes
1answer
36 views

references for the colloquial naming of spatial data resolution

In our era of data deluge, many folks, including myself, quest for ill-defined "high-resolution" datasets. I suspect that colloquial description of spatial resolution as "high" or "low" is and will ...
2
votes
3answers
259 views

How can I change map scale in ArcMap, after I'm almost finished digitizing? [closed]

I'm just about to design a map that represents different areas in my immediate living environment. I Unfortunately made a big mistake at the beginning of my project. The current scale is given by ...
0
votes
0answers
102 views

issue with QGIS Scale Level

I have different layers of shape files. I have imported all shape files into PostGIS. Now i want to show 3 layers Country, State & District with different scale/zoom level I tried to set scale ...
2
votes
1answer
614 views

ArcGIS giving measured distances and the scalebar incorrectly

I am currently using ArcGIS 10.1 and am struggling to be able to measure distance or set a scale bar correctly. Its currently giving me absurd results orders of magnitudes to small (0.5m etc). All my ...
0
votes
2answers
238 views

Is it possible to set a reference scale in QGIS?

It's a little tricky to pick label and feature styles (line thickness, colours, etc) in the map canvas because they don't reflect what I would see in my print composer which is at a different scale ...
1
vote
2answers
156 views

Rasters added to mosaic dataset only display at large acale

I have a set of 357 rasters in .jp2 that I've added to a mosaic dataset. All but 7 of them display properly, but the 7 only display at larger scales, around 1:6500 and under. I've tried adding them ...
0
votes
0answers
26 views

Can I set the units for item properties scale field in composer?

This question is about the scale field in item properties, it's NOT about scalebars on a map. I'd like to be able to set the scale to something that is readable without using a calculator. So let's ...