The study and practice of making maps.

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8
votes
4answers
2k views

How to force polygons to the bottom, without compromizing drawing speed?

I have a large polygon dataset and no time to rebuild it to regoranize the Object IDs. Many polygons are drawing above others, blocking their symbol (for example on one side of the polygon). I tried ...
2
votes
0answers
243 views

How can I modify the tiles size in Openscales or other ways to boost the application performance

I am developing an application in Flex that uses Openscales and GeoServer in order to provide a map in the background. It works but the perfs aren't really good; even if everything is on the same ...
5
votes
3answers
4k views

Different level of detail(layers) on different zoom level at OpenLayers map

I want display different detail(layers) on different zoom level on OpenLayers map. I mean when zoom in should display lot of layers and when zoom out those unsuitable layers should hide automatically. ...
3
votes
1answer
124 views

Is there any extension to “optimize” the creation of maps in QGIS?

is there any extension to "optimize" the creation of maps in QGIS? i searched the repository, but found nothing useful, maybe i searched in a wrong way.. there are some things i am really missing: ...
5
votes
1answer
2k views

How should I correctly exaggerate a hillshade raster (ArcGIS10, Spatial Analyst)?

I once wanted to generalize a high resolution raster and instead of MEAN i accidentally selected the default SUM technique, using a cell factor 5 (Lidar DEM is 1m resolution). When I used this result ...
7
votes
3answers
3k views

How to create a user map from CSV?

I dont even know if QGIS is the right program for what I need.. What I need: I need a program with maps(Denmark to be specific), that I could feed with a database of users through a CSV file.. e.g. ...
0
votes
1answer
505 views

How can save and restore my map's extent with GeoExt?

I'm using GeoExt with OpenLayers and trying to save the extent of the map. while exploring the page, users can be able to save the extent and restore via their browsers. Here is the point that I'm ...
1
vote
1answer
1k views

sending a XAPI-Request to the API-Server - over http

pretty new to Geo-Informatics so do not bear with me if my questions sound like newbie-questions: can i do some requests on POIs of Openstreetmap with XAPI. doing like so: i send a request to the ...
3
votes
2answers
1k views

Python and Data driven pages - Advanced use

I need to make a number of maps where only one input changes (a layer with the range of a radio tower) and I want to add the layer, apply symbology, zoom to it, change the title to include the name of ...
1
vote
1answer
151 views

I would like to show points moving on a map by date

I would like to create a map where i can see points moving. I have table of points for example with a date column, A 01/01/2012 B 02/01/2012 C 03/01/2012 D 04/01/2012 E 05/01/2012 F 06/01/2012 I ...
0
votes
2answers
4k views

Most useful program to create an accurate city map for printing?

I googled around and several sources said this would be a good place to ask about mapping so here goes. Thanks in advance for reading! I want to make my own city map (specifically Paris) as a gift to ...
0
votes
1answer
669 views

Best way to build my own simple web-based map server

I've got a requirement for a project where I need some relatively simple mapping functionality on a web page. I'm familiar with the Google Maps APIs but unfortunately this is a project that will be ...
2
votes
1answer
290 views

Embedding slippy map in Access form

I have an access database which holds several sites. This is linked to a MapInfo TAB file which holds geometry for each site. I would like for our non-GIS users to be able to view the sites in an ...
4
votes
1answer
2k views

How to display Radius after Resizing a Feature in Openlayers

@captDragon has helped me with calling the coordinates of a polygon after I have resized or dragged the feature. Ineed the radius now, i have done a radius alert on my other map,Which works correctly, ...
2
votes
1answer
214 views

Which software to use for designing city plans?

Which software would you suggest I use for designing city plans? The result needs to be an image (jpeg) so georeferencing is not necessary. I have options like ArcGIS, AdobeInDesign, Adobe ...
6
votes
2answers
598 views

How to alter transparency by spatial location

I'm trying to create a map that has a all layers within a subject area having 0% transparency (full opaque), while features outside that area (defined by a polygon shapefile) having a reduced ...
5
votes
4answers
2k views

How do I automate custom edge labels for township range in ArcGIS 10?

I need to label township ranges along the side and top of my map, respectively. I know the grid in the frame properties is a way to label the edges with lat/lon. I Think there is a way to do the same ...
7
votes
2answers
2k views

Build and export PDF maps using ArcObjects?

I have a series of featureclasses and rasters generated using ArcObjects and calls to the Geoprocessor. I have the paths to the output, which are located in a file geodatabase. How can I use ...
3
votes
1answer
535 views

How to print to a specific scale with QGIS?

How can I print a map with qgis to a specific scale? E.g. I have a map of Austria (projection: albers equal area) and want a printout on paper at 1: 3000000? Thanks Kurt
2
votes
1answer
914 views

How can I apply symbology from two layers to one feature class with common features using ArcMap 10?

Say I have two layer files. Layer file 1 has symbology for feature types A, B & C. Layer file 2 has symbology for feature types B, C & D. In these two layer files, feature types B & C are ...
1
vote
0answers
169 views

ESRI Silverlight Cartography - Looking at whats not there

I have line data that has been symbolozied in ways that I don't have time to understand and would like to make a map that tells me =). My general question is how to display the lack of data results ...
3
votes
2answers
2k views

How to show “First Vertical Derivative of the Magnetic Field” survey data on a map?

I will be given a magnetic survey raster and I am being asked to display this on a map as a "First Vertical Derivative of the Magnetic Field". I've done this before with a different older dataset but ...
4
votes
2answers
293 views

Is there an advanced way to label in ArcMap so that the label will not be dropped?

Is there an advanced way to label in ArcMap so that the label will not be dropped?
3
votes
2answers
4k views

How to Zoom in QGIS Print Composer Without a Scroll Wheel

I am attempting to print a simple map from QGIS in portrait orientation. When I use the "Add New Map" tool it brings the map in at an extent which matches my original data frame if I were to use ...
9
votes
3answers
916 views

Put the author's name on maps?

I've been informed by my employer of a new policy where I am not to put my name on maps. I've always put my name on my maps in the past and have never run across this policy. Is it uncommon in the ...
10
votes
2answers
218 views

How thick in ground units is this line on a printed map?

Sometimes in discussing how accurate this that or the other thing needs to be someone will make the observation that "a line shift of 30m at 1:1million scale is less the width of the line itself when ...
47
votes
8answers
2k views

One dimensional map of the world?

Bit of a strange question but hope this is OK to ask here. Has anyone heard of a '1-dimensional' projection of the world map - that is mapping all the points on the globe to a single line? I was ...
6
votes
5answers
5k views

How to map the frequency of overlapping points within an urban area?

I've been asked to do a favor for someone since I'm "the mapping guy" and could use some theoretical help by way of examples since my actual cartography skills are a little rusty. I have a series of ...
6
votes
1answer
116 views

How can I generate a range of pantones for a map?

When I am given a map (or make one...) I often like to get an idea of the range of colours present. One thing this does is it allows me to quickly visualize contrast (helps build maps for colour blind ...
6
votes
3answers
1k views

How to place multiple symbols on one polygon centroid?

I am using QGIS for visualizing the health conditions of elderly living in an old age home, some of the elderly have multiple medical device with them and I want to show them on the map. Suppose I ...
6
votes
2answers
4k views

Can I alter font size using label expression?

I have two label classes displaying dynamically over my parcel polygons. The owner info is the major label with larger font size and bellow it I am displaying some property type info in smaller font. ...
24
votes
9answers
3k views

Effectively displaying demographic data on a printed map

I would like to plot the following per zone (30 zones total) data on a printable/non interactive map: Average age Average household income Number of households Population density Number of people ...
25
votes
2answers
10k views

How to style beautiful road maps with QGIS?

I am trying to design a beautiful map using Qgis. As I'm a software developer not a designer, I was hoping that this will be easy, but it isn't! There is a similar question here Qgis tutorials and ...
22
votes
3answers
5k views

How to hide “internal” polygon boundaries?

We've been scratching our heads over how to tackle this for some time, and are no more illuminated than when we started. I hope you can help. Our task is thus: how to draw a lake with a solid outer ...
11
votes
7answers
2k views

Color palette conventions

I wonder if there is a "unified" source for map color conventions, that GIS map builders are encouraged to follow? EDIT To clear up my question a bit. I'm more interested in the color <-with ...
0
votes
1answer
310 views

How to reuse Thematic layer definitions in Mapinfo?

I have a map from table. Let the table be TABLE1. Now That I have created Thematic Map from Column1 of this table. Again I executed the following query Select * from TABLE1 where TABLE1.column1 ...
0
votes
1answer
424 views

Arcmap 10 corner label measured grid

I am using the corner label feature in Arcmap 10. This allows you to set the "Numer of principal digits" and the "Number of base digits". What do these properties refer to?
13
votes
4answers
958 views

What resources can you suggest for making beautiful online Maps or Mapping applications?

As a GIS developer, my design skills are rather limited. Are there any links, books or resources, that you would suggest to make my online maps more pleasing and beautiful?
6
votes
4answers
10k views

How to reproject base layers in OpenLayers?

The issue is: I have vector/topo/image tiled maps for some places in north america which were published as ArcGIS Server REST service. These maps (A) are based in EPSG26912 projection. Now I wanna ...
4
votes
1answer
298 views

What is the most “logical” route generating site (for Europe by car)?

What is the most logical route generating site do you think is out there? By logical I mean optimizing the driving time between two points. (Not always is the fastest way to proceed found along the ...
1
vote
1answer
495 views

How to hide coordinates points in mapinfo?

I have created labels ,legends scale and North-direction pointer but I now need to conditionally hide or show the points using button in mapbasic program but I don't know the syntax. Where can I ...
10
votes
3answers
503 views

How is margin of error reported on a map?

When reporting estimates you should always include the margin of error. There are conventional ways of reporting margin of error in a table, text or graph. But, how do you report margin of error for ...
6
votes
5answers
746 views

Provincial Base Mapping Data Sources in Canada

I'm very familiar with the Ontario Base Mapping Data, and am looking for similar data for other Canadian Provinces. Perhaps we can start a list of resources here? I'm looking for something at a larger ...
6
votes
3answers
2k views

How to normalize choropleth maps of census information?

I'm trying to improve on the census-based maps on this site, which shows census values at 5 scales from Collection Districts through to State. Currently the maps show whole numbers (eg total ...
3
votes
0answers
1k views

Converting projected coordinates to google maps pixels

I have a single polygon in a local projection system. I would like to convert that polygon into an image that can be used as an overlay on google maps. I understand that it may be better to use ...
0
votes
1answer
465 views

How to point out a city from a map image of world with longitude and latitude?

have a map image 800px wide. How can I figure out a city. like New York has 40.75 latitude and -73.98 longitude. I have to pin a mark over this point. Before I have done with x_axis and y_axis which ...
4
votes
4answers
2k views

ArcGIS: Maintaining the same layer styles over multiple data frames

Let's say you have a map with three or four data frames. In each data frame there is the same road layer. Is there a way to ensure that all the symbology/labeling/annotation is the same for that layer ...
7
votes
2answers
820 views

What is your workflow for designing “antique” maps?

I currently work with ArcGIS 9.3 and have decent competence with Adobe CS4-5 of Photoshop and Illustrator. I'm more than happy to branch out to other software. Essentially, I'd like to get really ...
0
votes
2answers
332 views

How to find which table has layer in mapinfo?

Is it possible to find if table has layer Or print list of layers? Edit:: I have a table when I selete some data from table like: Select * from earth where population >100 Then it create new ...
2
votes
1answer
1k views

GeoTools Dynamic Layer

I need to change the features of a MapLayer in real-time but I don't know how I can update/refresh/repaint the layer on the map without having to remove it and add it again (which creates flickering). ...