A visual representation of an area-a symbolic depiction highlighting relationships between elements of that space such as objects, regions, and themes
20
votes
9answers
1k views
Are North Arrows Pointless?
A recent post on Cartastrophe refers to a "Worldwide Campaign to Eliminate Needless North Arrows."
So when, if ever, are North arrows necessary?
As an interesting aside the concept of North being ...
20
votes
5answers
954 views
How to make beautiful maps in R?
There are quite some nice possibilities to analyse spatial data in R and in the context of my current project I would like to use R more frequently to do that.
Until now I plot my maps with ggplot2 ...
19
votes
3answers
769 views
How do I organize my GIS projects?
I have been struggling for quite a long time now with keeping my project files organized.
What are your tips for keeping your datasets, images, shapefiles, etc.. organized?
19
votes
2answers
393 views
How do I safely store paper/hardcopy maps?
What do I need to consider when deciding how to preserve paper maps safely from the ravages of time?
I am trying to understand some best practices when it comes to archiving and storing paper maps.
...
17
votes
6answers
18k views
Google Maps zoom level --> ratio…?
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
14
votes
2answers
537 views
Which world map projection allows comparing countries by shape and size?
The Mercator projection increases scale along with the latitude. Greenland seems larger than Australia, when in fact it is much smaller. The equal-area projections however stretch shapes away from the ...
13
votes
4answers
222 views
How to implement a “Snap to Road”-functionality?
I am having a problem with a little application I'm trying to develop. What I do is take a phone with me and drive around the city on a bike.
I collect all the Latitude/Longitude-pairs and at home I ...
12
votes
3answers
4k views
Free download of Soviet topographic maps (also known as Genshtab maps)
In the past, http://poehali.org/maps/ offered a free-of-charge download of Soviet military topographic maps of many areas in the world. Those maps are in the public domain. Now, this site redirects to ...
9
votes
4answers
348 views
Where can I find historic maps of city size?
I'm interested in examining basic dimensions of city size, primarily area (though population would also be of interest) from the earliest possible records. It does not matter where the city is in the ...
8
votes
4answers
300 views
iPad mapping application with custom maps
I'd like to load custom maps onto my iPad and use them offline with the GPS for navigation. These are maps I can prepare in any format and projection. Is there an application that can take, for ...
7
votes
2answers
5k views
7
votes
2answers
527 views
What is the effective and legal way to get map tiles for the size of 2 or 3 states?
I would like to get map tiles possibly from Open Street Map (yes I am aware about tile usage policy and would not like to breach that) or other source for the purpose to serve it as offline maps to ...
6
votes
1answer
104 views
How many GIS projects deal with just basic “putting markers on a map”?
Is there an academic paper or conference contribution, where someone estimated how many GIS projects actually deal with only a very basic usage of GIS data? Something equivalent to the infamous "80% ...
5
votes
7answers
2k views
What map source/API/tools are recommended to create Web GIS/Mapping application utilising Microsoft technologies?
I'm researching about technologies (around Microsoft tech) to create mapping application and would like to have advice/suggestions.
Brief requirement to build mapping application with Microsoft ...
5
votes
2answers
366 views
PostGIS ST_Distance vs. pgRouting
I am looking to create a city directory web app, and the site will need to be able to calculate distances between two geospatial points (like the distance between the user and a restaurant, or the ...
5
votes
5answers
423 views
Are the Canadian National Topographic System (NTS) maps available freely online?
I'd really like a seamless service of the Canadian topo maps, similar to ArcGIS Online USA Topographic Maps, http://www.arcgis.com/home/item.html?id=4ee3622f0bfd41eea55ffa83aaf31a9f
If there is no ...
4
votes
5answers
260 views
Require a 3rd Party GIS service to embed in my application
I am looking for a service (Free or Premium) that allows offline access to maps and also gives the functionality to search map using an address or Latitude / Longitude. I want to embed it into a Web ...
4
votes
3answers
96 views
How to print from arcpad without buying more ESRi sofware?
I am running ArcPad 10 in windows 7 on a laptop and on a field unit consisting of an Ashtech MobileMapper 10 as a PDA talking to an SXBlue GPS. This system provides the real time half meter (without ...
4
votes
1answer
4k views
How to highlight the area in google map on mouse hover
I want to implement a feature in my app (gmap powered) to highlight the area on mouse over. Much like the functionality in wikimapia. Check out the pic
or url
But i could't find any info on how ...
4
votes
2answers
103 views
How to solve loading performance issues when handling multiple KMLs?
I am using over 10 KML in Google Maps. When I increase the number of KMLs they load too late.
I use checkboxes to hide/show KML layers. With up to 5 KML layers, it worked fine. When I increase the ...
4
votes
1answer
1k views
How can I render latitude-longitude coordinates on a map with D3?
I am trying to overlay dots of arbitrary sets of longitude-latitude coordinates on top of a United States map.
So far I have found the D3 cartography example, but when I try to place dots on X,Y ...
4
votes
1answer
66 views
Does Oracle MapViewer support PostGIS?
I use Oracle MapViewer to generate my mapping data and currently I'm using an Oracle database as my spatial back-end. I would like to move my data over the PostGIS but I can't find any references if ...
3
votes
2answers
45 views
Clipping a raster in R
I am building a map for the northeastern U.S.A. The map background needs to be either an altitude map or a mean annual temperature map. I have two rasters from Worldclim.org which give me these ...
3
votes
1answer
77 views
Transit webapp development (journey planner)
I am going to develop a journey planner (like Google transit), i was just wondering that if there any opensource API available that can help me, or i have to do every thing on my own.
And where can i ...
3
votes
3answers
2k views
HTML5 maps with dynamic data instead of Flash
I was wanting to create maps on our site similar to http://globaledge.msu.edu/Countries/Rankings except that we want the maps to be HTML/HTML5 instead of Flash. (The above site is the site that I'm ...
3
votes
2answers
701 views
esri google maps api - Create a single GPolyline from an array of features
I'm using the esri google maps extension api...
I have a esri.arcgis.gmaps.FeatureSet()
(of type esriPolyline) containing an array of features (esri.arcgis.gmaps.Feature()).
Is there a simple way ...
3
votes
1answer
82 views
Customizing opentripplanner webapp
I am using opentripplanner for an app development. I want to customize the webapp. It has many different maplayers (its using openlayers). I want to change some mapslayers, but i couldn't find in ...
3
votes
1answer
253 views
making choropleth maps using PostGIS Windows
i read an article on chicago tribune blog about making maps,
it consist on "making choropleth maps using PostGIS, TileMill, Mapnik and Google Maps" on Mac environnement, my question is how we can ...
3
votes
0answers
54 views
Interactive maps for a survey - Are there any tools yet?
i am working on a draft for an online-based survey. I would like to enable the participants of the survey to draw polygons, lines and points (several) on a basemap (e.g. google maps) and (extra ...
3
votes
0answers
107 views
How to make a visual realistic map containing mountain hiking trails/tracks?
I would like to try making a map that visually reproduces a mountain/hill and contains hiking trails, just like this one:
http://i.stack.imgur.com/PdcnM.jpg
I imagine some steps like this:
Generate ...
2
votes
1answer
1k views
Polymaps Project + Geojson + D3
How are you doing ? I am Mehul Nahar working on a project which is similar to http://www.tableausoftware.com/learning/examples/gpa-analysis. I have used Polymaps platform, where I have used cloudmade ...
2
votes
1answer
89 views
Website, tool or app to produce colored map of the United States?
Does anyone know of a website, Windows program or iOS app that has a clickable map of the United States and colors in the states that are clicked on? Looking to produce a map of states I have visited ...
2
votes
2answers
118 views
Is there a geo-fence map of Apple's or Google's reverse geocoding?
Is there a map that shows how lat/long maps to locality/county/sublocality/subadmin and possibly covered area?
2
votes
1answer
84 views
I want to create my own topographic map
I need to create topographic maps for scales between 1:100,000 and 1:500,000. This is due to the fact that the official topographic maps in my country are offered in 5k, 10k, 25k, 50k, 100k and 500k. ...
2
votes
1answer
446 views
How to design markers - raster or vector?
I have several layers that are point geometries. I am defining them custom markers symbols and such symbols have colors (red, yellow and green) to represent values.
Since there are several of them in ...
2
votes
1answer
641 views
OpenLayers: add a listener to a single polygon
I want to add a listener to a single polygon. Currently, I am trying to add one that makes a polygon opaque when you click on it, but I should be able to add any general listener. OpenLayers.Layer has ...
2
votes
3answers
4k views
Google Maps/Google Earth - KML Overlays and Custom Orientation
I am am trying to get the floor plans for our various buildings imported into 4 separate KML files, one for each floor level so that I can toggle them with javascript. I'm able to overlay our floor ...
2
votes
1answer
461 views
What is wrong with this Proj4 transformation?
I'm implementing support for WMS maps in my company's software. Servers return a list of projections their maps are available in, but our software only displays data in WGS84 (lat/lon or UTM), and ...
2
votes
2answers
1k views
Google Maps JS API v3 - Polygon formation
So my big question here is how does the Google Maps API determine the "inner" versus the "outer" for a filled polygon?
Playing around with the polygon creator @ http://www.the-di-lab.com/polygon/ ...
2
votes
2answers
134 views
How to improve the precision of KML files on Google Maps?
I am adding kml file to the google maps (api v3). Now the problem is that on google earth and google maps the accuracy of my kml decreases to kilometers. I am designing constituency boundaries and i ...
2
votes
1answer
116 views
How do I export neighbourhoods in wikimapia to KML file [duplicate]
Possible Duplicate:
How do I export from Wikimapia to KML
I am trying to export the neighbourhoods in Wikimapia to KML format. Is this possible? These are all the predefined neighbourhoods ...
2
votes
1answer
199 views
QGIS – Batch maps (atlas plugin style) in same location
I've got more than 200 shapefiles of points representing different information for the same location. I would like to make as many maps as shapefiles with identical background and extent. I'd rather ...
2
votes
1answer
542 views
how to get Coodinates after Resizing a feature Openlayers
I'm trying to display the coordinates of a Feature or vector layer after I use the modify radio button to resize my vector, but it does not work, nor on my drag feature. I'm using ...
2
votes
0answers
94 views
Plot csv data on a map
My boundaries shape file has the following attributes; CODE, PROVINCE, AREA, SHAPE_LENG and SHAPE_AREA (note that there are no geo- coordinates). My data on the csv file has the following fields; ...
2
votes
0answers
169 views
Openlayers text layer is not working
I am trying to load markers from a text file using openlayers text layer, but no marker is shown, text file and icons are in same directory. However I am able to show markers using marker layer. My ...
2
votes
0answers
20 views
Cloudmade Web Maps API Geocoding Issue [duplicate]
Possible Duplicate:
Cloudmade Web Maps API Marker Clustering problem
I'm at Geocoding in Cloudmade Web Maps API. I've the code below. Whenever I try to access the page, content of elements ...
1
vote
1answer
90 views
How do you get the coordinates from a drag event in the Google Maps API V3?
I have made a Google Version 3 Geocoder , I want to be able to pick up the coordinates of the route when it is dragged. I know how to pick up the coordinates giving the start and end points, but, ...
1
vote
1answer
405 views
Unproject Radius with Openlayers with CRS:84 Projection
I have made a Openlayers integrated map that lets you draw a circle, On completion of the circle I have told the map to give me , Bounds, Center Long and Lats, and lastly the radius. My problem is ...
1
vote
1answer
63 views
leaflet show miles/kilometers
Googlemaps shows you how large an area is on a map by showing a small bar with the number of miles/kilometers at the bottem left. Does leaflet also support this somehow?
I do not see it listed in ...
1
vote
1answer
147 views
Small Idea to get best path between two points
Guys I don't know if its a good place to post ideas or to ask general questions. Still as the question is related with maps service, I am posting it here. If it's not the right place, please move me ...
