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

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0
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0answers
181 views

Dynamically scaling PointSymbolizer with external svg without using scaledenominator filter in sld

In this example taken from Graphic Symbology - External Graphics, <PointSymbolizer> <Graphic> <ExternalGraphic> <OnlineResource xlink:type="simple" ...
1
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0answers
72 views

What are the standards to implement scale bar?

I am working on .osm data files, and now i want to implement scale bar for available data. logically i have created the scale pixel is to geo location. I want to know whether there is any standard to ...
5
votes
1answer
208 views

Georeferencing a jpeg in QGIS but the scale is way off

I've gone through the really helpful walk-through(s) of how to georeference a jpeg in order to make it a layer, but after inputting the coordinates (either by typing in actual coordinates or clicking ...
0
votes
1answer
97 views

How do I essentially crop an ArcGISTileMapServiceLayer as an object while maintaining the integrity of the basemap

I am using the up-to-date flex api and esri api for flex. I know how to use flex to obtain a snapshot of a map, but ultimately what I want to do is retrieve a scaled up image of a part of the basemap. ...
7
votes
2answers
188 views

What does map scale refer to in map making / field survey metadata?

If I have, say, a printed map at the scale of 1:20000 and the legend says that it was mapped at a scale of 1:10000 does this simply mean, that the surveyors/cartographers made drafts & sketches or ...
0
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0answers
142 views

Can you insert a marker symbol at a specific scale?

I have a map that is consistently used at a 1:500 scale. I want to be able to add structures to the map to view and move them around to get the best fit. The end user is new to GIS and I am trying to ...
3
votes
0answers
744 views

How to use Scale tool when Georeferencing Raster in ArcMap?

I'm georeferencing a bunch of maps in ArcMap 10.0. The Shift and Rotate commands are pretty easy to use, no problems there. But whenever I use the Scale command, the image completely changes ...
2
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0answers
60 views

Set a user scale to use QGIS for surfaces documentation

I would like to use QGIS for the documentation of mural paintings (so I don't need georeferecing) I would like to set my own scale from a raster file (measure a know distance and use it as reference). ...
2
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1answer
280 views

How to Determine to world map size in pixel given this data?

How to Determine the world map size in pixels given this data? Map size of a particular area say, for example: Makati city, Philippines with bounds: Top-Right: 121.0281, 14.56497 Bottom-Left: ...
3
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1answer
226 views

Clarification of Map Scale

I need some clarification. I have a map the is set to the scale of 1:6000. In Settings>Project Properties, under the General tab I have the Layer Units set to feet. Therfore I assume that means the ...
3
votes
1answer
211 views

How to get correct scale values?

The scale of my map is wrong, no matter what coordinate system I use in my project. The map and all objects show the correct coordinates but the scale of the map shows nonsense and the measurement ...
1
vote
2answers
297 views

What is the default unit for QGIS scales and how do I set it to KM?

I want to render a specific layer only between 0-12km but have no idea how to set it in QGIS because the scales dimensions are high numbers. My project and layers CRS is EPSG:2039 Thank you .
3
votes
1answer
276 views

How to use scale -rule based renderer in QGIS?

I wish to render a shapefile of builindings such that at scales below 1:5000, they have a border, and above 1:5000, they do not have a border. For this, I went into layer properties, selected ...
5
votes
2answers
301 views

Can you print cross-hatch area fills like they appear on screen?

I'm trying to use a cross-hatch symbol on polygons in QGIS. When displayed on screen, they look just fine - both in the map and in the composer. The problem is when they are rendered to an image ...
3
votes
1answer
72 views

Is there a way to scale to 1:1 in QGIS Cloud?

Someone knows if with QGIS cloud Pro Plan, it's possible have a scale till 1:1. I use QGIS to draw small stuff on my gis (archaeological finds, as really small pottery's sherds) and I need a scale ...
1
vote
2answers
1k views

What do I need to change to get scale bar units other than degrees?

Measurements done in QGIS on my project are done properly using whatever unit is set in: Settings > Options > Map Tools > Preferred measurements units but the scale bar decoration and scale bar in ...
4
votes
1answer
271 views

Why do base and overlay only match at scale 1:1000 and 1:2000?

We are using GEOSERVER 2.1.4 to overlay WMS on GoogleMaps V3 with Openlayers . The problem we have is at different zoom levels the scale of the WMS overlay is different from the scale of the base ...
1
vote
1answer
658 views

displaying scale of dyamic map service layer using ArcGIS JS API

In ArcGIS JS API, I would like to know and display the scale of a dynamic service layer by using the onExtentChange event, but the LOD argument is only valid for tile map services. Is there an ...
2
votes
1answer
240 views

Python script for Data Driven Pages to run a series of DDP at once?

I have a several different polygon shapefiles that I am using to create individual maps for each polygon within the shapefile. The layout is the same for each map, the only thing that changes is the ...
4
votes
1answer
283 views

how does arcmap calculate scalebar inside a WGS84 layout?

ArcMap lets you put a scalebar inside a layout referncing a WGS84 data frame. How is the scale calculated? Is it a "mean" scale? And, in case it's right, what "mean" scale could mean?
1
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0answers
207 views

ScaleLine shows NaN for LCC projection

I have used openlayers along with geoserver. My Map is having LCC projection by default, but SRS is EPSG:4042. The problem is that the scaleline shows NaN in meter as well as feet. How can I correct ...
0
votes
1answer
113 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
vote
1answer
300 views

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

I am done making a map in print composer, I am trying to add the scale bar and its appearing as a box with a zero digit inside it what should I do to make it display in a proper way? thanks in ...
4
votes
2answers
4k views

Arcmap 10 feature with undefined coordinate system projects incorrectly when projecton is defined

I'm fairly new to GIS, and am slowly feeling my way through ArcMap 10. I have run across a problem defining the Geographic Coordinate System and projection for a feature (the feature currently has an ...
1
vote
1answer
1k views

Dynamic scale bar, coordinates and grid for map frame in Mapinfo map layout

I believe dynamic scale bar and coordinates (grid) for map frame in map layout are BASIC things which Mapinfo (GIS software for thousands dollars) should allow me to do. To make it clear I am talking ...
1
vote
0answers
241 views

A WMS layer fails to show at some scales

I am tring to overlay my WMS layer on Google but at a particular scale it doesn't show the data of my layer. What can be the problem? <html xmlns="http://www.w3.org/1999/xhtml"> <head ...
0
votes
1answer
289 views

How to create text label of different scales?

I would like to create a different type of map in ArcMAp.I would like to present the frequency of some words. So the dimension of the word (maybe even the color) would symbolize its frequency. I ...
1
vote
1answer
100 views

Can I avoid runtime raster interpolation by creating an image pyramid to match the zoom scales?

For image quality and performance reasons, it would be best to perform interpolation of my large TIFF image of the world (10GB) beforehand to all the zoom scales I need to display at so that MapGuide ...
6
votes
2answers
836 views

How to create a vertical scale bar in ArcMap?

Wondering if anyone out there knows how to create a vertical scale bar in ArcMap? With text I can adjust the angle. Is this possible with a scale bar as well?
1
vote
1answer
274 views

How can the scale be projected correctly in Quantum GIS when it is imported from google earth (KML) files?

While importing KML files from google Earth to Quantum GIS, the scale is not being projected properly and the area of a particular selected feature is not being calculated in the attribute table by ...
3
votes
1answer
2k views

Openlayers + WMS layer. Use scale or resolution + DPI

I have a problem with displaying map with WMS layer in Openlayers. I'm able to display it but the image of the map is not sharp especially at higher zooms. I have a documentation from the map ...
1
vote
1answer
612 views

OpenLayers Scaleline always wrong in my virtual star map

I got a problem for the scale line when I using openlayer to show my "star map". Basically, I give a set of 2D coodinates (X,Y) for each star, and generate the map using map server. Now the map can be ...
3
votes
1answer
813 views

Changing the scale (generalisation) in ArcGIS 10

I have 2 polygon layers, accordingly 1:10 000 and 1:500 000. I want to generalize the first layer from 1:10 000 to 1:500 000. I tried using Simplify polygon tool, and since these scales relate to ...
4
votes
1answer
609 views

Find a suitable font size for the map scale?

Is there a website that suggests suitable font sizes for each scale level in the layout? I am currently using ArcGIS 9.3 but pretty soon will upgrade to 10. Thanks !
3
votes
1answer
319 views

What are some examples of model-based upscaling of raster data?

Remotely-sensed raster data may be too fine-grained for many purposes. A typical approach to coarsen the grain is to upscale by reducing the resolution. If the data are continuous (e.g elevation, ...
2
votes
1answer
410 views

How to show labels depending on the zoom scale and save it forever in one project?

I have got a problem in showing labels for a polygon layer : When I select "Show labels" in the layer's properties, then I select that I want to use the scaling to show or not my labels and I ...
2
votes
0answers
427 views

How to calculate the scale of map tiles accurately?

In web maps, there are two coordinate: wgs84 geographic coordinate and web mercator project coordinate. The displayed scale of a world map is the value at equator, and one 256*256 pic can contain the ...
3
votes
2answers
281 views

What is the unit of measurement for scale?

Maybe this is standard across mapping engines, but in MapGuide if I set the scale to 7 million I can see about half the world. At about 4 million I can see a continent. What unit of measurement ...
5
votes
2answers
1k views

Using GIS for Interactive Floor Plan

GIS is brand new to me, but I've spent a couple of days researching so that I can at least ask somewhat intelligent questions. I've decided to use QGIS I need to do an interactive floor plan on the ...
7
votes
5answers
2k views

What are standard scales, or zoom levels, for map applications?

I am working on an ArcEngine program that is restricted to a set of scales. It currently has: 1:187.5 1:375 1:750 1:1500 1:3000 1:6000 1:12000 1:24000 1:50000 1:100000 I don't think there's ...
0
votes
1answer
149 views

How do I change the scale of one map sheet within a map series in MPS Atlas

I am using MPS Atlas and have a large map series (almost 300 map sheets) with the Areas Of Interest defined by the polygons of a feature class with a 100 m buffer on each polygon. This works well for ...
4
votes
1answer
1k views

How can I change the display name of the “Scale” control?

Here is the thing. I added the Scale control to my web and is displayed in a div at the bottom. I need to translate the "Scale" text to other language but I can't find how to do it. I searched in the ...
2
votes
2answers
3k views

ArcGIS javascript API - draw circle of a specified radius in meters

I am trying to add a circle of a specified radius (let's say 200 meters) to a map. My thought is to create a SimpleMarkerSymbol object. The constructor asks for a size of the symbol in pixels, but I ...
3
votes
2answers
3k views

Why does QGIS scalebar show a wrong scale?

I'm using QGIS 1.7.1 and have added a scalebar. The scalebar usually displays in degrees, unless I switch the map's projection to meters, in which case the units are display in cm. This is not ...
4
votes
1answer
650 views

Dimensional analysis/conversion problem: Map scale to image resolution (dpi)

Given a map scale of 1:17,200 and a raster whose cell size is 6 inches, what resolution (dots per inch) should I choose when exporting the map to an image in order to maintain the raster's native ...
11
votes
4answers
403 views

How to generalize coastlines?

I have a large set of data points that essentially represent the coastline of the world. I don't know the exact resolution but I'd say it's in the neighbourhood of 5-10m. Imagine a set of points ...
5
votes
1answer
200 views

How to fix distortions in rendered OpenStreetMap maps?

I use OpenStreetMap in order to generate maps and add some cool stuff in it. Actually I have good results but I seem to have a problem with reporting a good image ratio when I create my generated ...
2
votes
0answers
2k views

How to zoom exactly to a desired scale in Flex?

I am using ArcGIS API for flex 2.4 with ArcGIS server 10. I am trying to write the widget where user can define the map scale (type it in text box) and it will zoom to that scale. I successfully ...
3
votes
1answer
1k views

Mapserver, TMS, Scales zoom levels and how to deal with all of it

I have a whole bunch of data in my db that I need to draw at different zoom levels using Mapserver. Everything uses a 4326 SRID. My (custom) client, will fetch the data using 20 TMS zoom levels and ...
7
votes
3answers
335 views

How to handle display of nested polygons (census, county/state, etc) for a given map extent

My question is how best to decide which layer (from a set of nested, aggregated census polygons) to display for any given map extent in an online map. Australia's census boundaries are built from ...