Questions tagged [maps]

A visual representation of an area-a symbolic depiction highlighting relationships between elements of that space such as objects, regions, and themes

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32
votes
2answers
55k 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 ...
7
votes
1answer
11k views

Adding Multiple Maps in QGIS Composer?

I am working with QGIS Composer 2.0 and I would like to add a second map. What I would like to do is to have a main map that takes up the majority of the print area. This map, Main Map, will have ...
4
votes
1answer
20k 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 to ...
1
vote
1answer
781 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 ...
23
votes
2answers
2k 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. ...
14
votes
0answers
1k views

How to implement a “Snap to Road”-functionality? [duplicate]

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 ...
9
votes
3answers
11k views

OpenLayers maps issue with SSL

I am using OpenLayers map by using the hosted JavaScript: <script src="http://openlayers.org/api/2.13.1/OpenLayers.js"></script> But my client has SSL installed and when I try to run ...
8
votes
4answers
5k views

Create an inset map in R

I need to create a map of my sampling site, and the journal requested to make an inset map showing where in the world this map is, this is my map code. library(maps) library(GISTools) map('state', ...
3
votes
1answer
5k views

Smoothing raster map using R?

I am trying to create a map from raster data. The file came from a crop model, with resolution of 0.5 degree. Even when I disaggregate it (i.e. increase spatial resolution), the map looks really ...
2
votes
2answers
18k views

Openlayers How would i get a hover label over my polygon

make a hover/mouseover label for a polygon in Openlayers? I made a map with draw, delete and drag polygon function. Now I need to make a hover mouseover for this. How to get a hover label for ...
7
votes
3answers
12k views

How to know if a point is inside a rectangle on the map?

I have four points that represent a rectangle (a,b,c,d). I got these points from mobile GPS. In my database I have this table of business locations: bussId | longitude | latitude --------------------...
7
votes
5answers
1k 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 ...
3
votes
1answer
314 views

Two cartodb visualization on the same html page

I need to display 2 maps separate by vertical line on the middle of the html, it means on diferents and make some buttoms or aplicate the same zoom on both at the same time. I managed to put one ...
2
votes
2answers
20k views

Download Google Map tiles, images [closed]

I would like to use the google maps downloader to save satellite images from google maps (http://www.allallsoft.com/gmd/index.html), but is it legal to use? In the terms of service you can read that: ...
6
votes
1answer
770 views

Map on canvas renders after image saving [duplicate]

I'm a beginner to Qgis and Python; i need a script (don't need it to be a plugin) to get maps of selected features from a layer satisfying certain conditions; Here is my code: from qgis.gui import * ...
5
votes
1answer
373 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 ...
2
votes
3answers
341 views

Authagraph world map with deformed south pole instead

Read this first: The north pole is deformed on AuthaGraph world map I am interested in an authagraph map, where the tip of the tetrahedron is orientated to the south pole instead, so the deformation ...
2
votes
2answers
795 views

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
2answers
3k 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/ ...
1
vote
0answers
274 views

Mapping Kansas City based on X and Y Coordinates in R

I have a csv file in R that has coordinates of Kansas City, however, the values at these points aren't in any traditional longitude/latitude formatting that I am aware of. My data looks like this: ...
1
vote
1answer
551 views

Offline map with less zoom size and maximum area covered

I am developing a mobile app for which an offline map is required. Is it possible to have such map within few 10s of MBs? The requirement is to have: Map with smaller zoom size; e.g. In this URL of ...
1
vote
1answer
3k views

Resizing and Reshaping features in Openlayers

Resizing and Reshaping features in Openlayers. I have a map with Openlayers and some controls to draw and modify Features. I need to activate the Resize and Drag and Rotate check button fields as ...
1
vote
1answer
737 views

Style file with QGIS

I created a very good symbol layout for a current map. I will be creating similar maps just different regions and want to keep the symbols and markers that way they are. The new data will have same ...
1
vote
2answers
1k views

Make OpenLayers request WMS tiles only within a certain bounds

Is there a way to actually tell OpenLayers not to request tiles out of particular bounds? I want the rest of map and other layers still accessible, so maxExtent on map is not an option for me. I ...
1
vote
2answers
406 views

Is there way to acquire flight paths? [closed]

I am attempting to do a project for work that requires checking general (assumed or average) flight paths (position and speed along the route) against other data. Does this exist somewhere? Ideally ...
1
vote
0answers
202 views

Creating responsive interaction with tiled maps

I think I may have two conflicting aims but... I need to create responsive Choropleth map very similar to http://leafletjs.com/examples/choropleth.html or http://www.texastribune.org/library/data/...