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

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0answers
5 views

How to convert map scale 1:10000 to nearest zoom level 16 scale 1:9028

I am making tile map service port for this map http://mapserver.geology.sk/sbd/. When you max zoom this map, you will get scale 1:10000. Tile size is 256px. You can check it here ...
1
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1answer
17 views

How to change rule-based Layer Styles all at once in QGIS?

Let's say I have a layer with buildings which is only shown when the scale is higher than 1:10000. When the scale is higher than 5000, I want them to show its function color (retail, residential, ...) ...
0
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1answer
464 views

Setting a scale range for labels in KML files

Is there a way for labels to be displayed in KML only when zoomed in (or out) beyond a certain scale range, just as it is possible in ArcGIS? If exporting to KML from ArcGIS, I guess the first step is ...
0
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1answer
132 views

Default Opengeo suite print module- scales given in selector differ when using the zoom slider

Using a default installation of the 3.0.2 suite, opening the Composer view(with the MapQuest OSM tiles as background) and clicking print (to pdf) to activate the print preview there appears to be a ...
1
vote
1answer
130 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 ...
1
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2answers
235 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 ...
2
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1answer
2k 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
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1answer
43 views

How to calculate scale

I'm working on processing some geo-spatial raster data, JOG-A raster to be exact, and know the imagery is supposed to be to a scale of 1:250000. However I would like to calculate this in code but am ...
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1answer
42 views

Setting Scale Dependent Visibility for WMS in PyQGIS

This code imports 'MiniScale' mapping from my WMS miniScale = ...
1
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1answer
373 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 ...
6
votes
1answer
900 views

How to automatically generate useful scales for data driven pages in ArcGIS desktop

I have been tasked with creating several hundred maps of properties that intersect a long pipeline. The maps will zoom to the part of the property which shows the intersection. The lengths of ...
3
votes
3answers
33 views

Layer Extent NOT Set When Bringing In ArcGIS Server map service?

I published a mapping service on ArcGIS Server 10.3, set the layer to 'Don't show layer when zoomed' 'in beyond' to 1:577,791, prior to publishing. When I bring in the mapping service into ArcMap, ...
1
vote
1answer
30 views

Disconnected Satellite map tiles usable with OpenLayers or other javascript api

I'm looking for satellite map, usable with OpenLayer (or with an other js api), with a good scale (at least 100m, MapQuest stops at 1000m) and avaible for a disconnected mode (avaible for download). ...
2
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0answers
20 views

Creating a distance overlay that is computed by the distance of points/lines and recalculated on zooming

I created a fictional map and visualized it with d3. Now I would like to show a scale/rule so that the user can see which distance (kilometers,meters) he is currently using. I was thinking about ...
1
vote
1answer
81 views

How to deactivate zoom on the mouse wheel?

I need to fixed scale in canvas in QGIS but I didn't find this function. If I fix scale it is impossible to make zoom in or zoom out into canvas. Only one move which layers loaded can be do are ...
0
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1answer
128 views

Why are grid and scalebar measures 1mm too long in a 1:10000 print?

I used qgis 1.8 to compose a map from the WMS-service of the Belgian NGI. I added a scalebar and grid to it. When I measure it by hand, the distance between the longitudelines is 101mm instead of ...
1
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1answer
205 views

Relationship between scale, ppi, and map resolution

Wanting to know the screen resolution (pixels per inch) of my device, I displayed my map resolution and scale using this openlayers code: console.log("resolution: " + map.getResolution()); ...
0
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0answers
33 views

Arcgis v10.2.4 ios and android sdk shows wrong cache data

I hava tiledmap and it's scale is 500.000 and when i tried to show on android or ios devices. It on mapview it brings me cached data of scale 300.000 but when i tried to show it on web page , it works ...
2
votes
2answers
47 views

QGIS Composer wrong scale

I'm creating maps with a specified scale for the map window in QGIS Composer. Project CRS is WGS84, layers are WGS84, onthefly-transformation enabled. The area is approx. 1° x 1° (100 x 100 km). But ...
32
votes
10answers
56k views

What ratio scales do Google Maps zoom levels correspond to?

Can anyone provide me with a link (or some details) on the actual ratio to "zoom level" figures for Google Maps? e.g. Google Maps Level 13 = 1:20000
3
votes
1answer
305 views

Sensitivity analysis for coarse scale GIS epidemiological model?

I am working on an epidemiological model with disease incidence rate as dependent variable and environmental factors as independent variable. Disease data is available at county scale whereas ...
0
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0answers
68 views

problem with show highway labels in certaint zoom level with mapsforge map

I'm using a mapsforge map ( .map format) in my projet .I converted the OSM file to mapsforge file and i use it. I want to show highway labels from zoom 13 to zoom 20 .I'm using vetorial map viewer. ...
2
votes
3answers
149 views

Moving (translating and scaling) a polygon in a shapefile

Updated Question: I have an ESRI shapfile of the US, with Alaska, Hawaii, etc, broken down by county. I'm extracting the polygons (each representing a county) from the shp file, and then displaying ...
1
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0answers
42 views

Small discrepancy in scale reported by OpenLayers and GeoServer (after DPI fix)

I'm implementing some scale-dependent functionality in an application that uses OpenLayers 2.12 on the client and GeoServer 2.6.1 on the server. The legend is created in JavaScript and when a ...
2
votes
1answer
59 views

Fixed Scale / Fixed Zoom in eCognition

I'm wondering if there is any option in eCognition Developer / Architect were I can control Zoom or Scale Factors. It's necessary for my work that I use the same scale for all processing steps.
1
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1answer
65 views

How to show\hide symbols according scales

How to show\hide symbols according scales, I couldn’t figure out if there is a way to hide symbols depending on scales the same way we do with labels. For example, in the screenshots below, the ...
10
votes
3answers
3k views

Changing symbology at different scales in ArcMap?

I am using ArcMap 10 and I want to display my village parcel symbology differently at given scales. I have one idea to copy and paste same layer. But my question is that in a single layer, is it ...
1
vote
1answer
58 views

CartoDB - How do I turn on a scale (in feet / imperial) in the Visualization?

I'm making a map for an architectural site analysis and need to have a scale for the Visualization. Is this a feature in CartoDB? Thanks!
3
votes
1answer
28 views

Equatorial Scale

I have seen Equatorial Scale written along with the RF on the World Map in many Atlases, for eg., "Equatorial Scale 1:95 000 000". What does this Equatorial Scale mean and what is the significance of ...
1
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0answers
104 views

How to get bounds coords by center LatLng point, width and height in pixels and zoom?

I have to calculate bounds coordinates to query mongodb box on server side to get data before google maps is loaded. How can I get four LatLng corners by center LatLng point, window width and height ...
1
vote
0answers
41 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 ...
9
votes
0answers
160 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 ...
1
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2answers
85 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
37 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
vote
2answers
126 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
vote
1answer
106 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 ...
3
votes
0answers
138 views

Use ArcPy to identify annotation reference scale?

I would like to retrieve the value of an annotation feature class reference scale using ArcPy (under ArcGIS 10.1). I cannot find where this property is stored (tried to access using the describe ...
12
votes
1answer
445 views

Scale in printed map (mxd) is different in code to manual printing

This question is related in part to a previous question I have asked. I have tried printing an A3 mxd with the Print Active View code as published by ESRI and have changed only one line of code and ...
1
vote
0answers
111 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
vote
1answer
57 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 ...
0
votes
2answers
132 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 ...
1
vote
0answers
15 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 ...
4
votes
2answers
146 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
vote
1answer
417 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
0answers
54 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
vote
1answer
339 views

How can I convert my scale bar from milimetres/ degree into metres or kilometres using QGis?

I am making a map in print composer. I am trying to add the scale bar and it's appearing as a box with a zero digit inside it. What should I do to make it display properly?
1
vote
3answers
66 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
30 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
94 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
vote
1answer
49 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 ...