Tag Info

Hot answers tagged

5

Yes. You can add in a second map to use as an overview map. You need to lock the features on your your original map first using the Item properties tab. There is a tick box for this in the Main Properties section. You then get QGIS looking how you want the overview map to look and then add it in using the print composer in the same way you added the first ...


5

You could use the freely available Level 2 GADM shapefile data for Greenland, which comes in EPSG:4326 (Lat/Lon projection) by default, and import it into R using the GDAL functionalities offered by the rgdal package. Then, define the geographic extent for Washington Land and crop the previously imported shapefile. Make sure you have all the required ...


3

Why not just use county shapefiles from the Census Bureau? The Census recognizes those independent Virginia cities as both cities and as independent counties for the purposes of geographic distinction. Here is a list of the areas designated at the county level by the Census Bureau for the state of Virginia. You can find shapefiles for all counties here.


3

there are a few examples on this site, like the maps of Africa and USA below. Also one map here and here Also note that in the first days of digital image analysis, raster images where printed with ascii caracters (one caracter per value). This was not really "art", but it was the only way to visualise (on screen or on paper) a raster when screens and ...


3

AE and AP are postal service designations to get mail to US military personnel overseas, not real locations on a map. Puerto Rico is a US commonwealth, not a state, but not an independent country, either. If your mapping requirements include Puerto Rico, then you should include Guam, the Marshall Islands, and other US possessions as well. If you spend too ...


2

The Google Maps Android API allows you to easily add your own, custom, tiles to the map. Essentially, you add a TileOverlay instance to your map, which uses your custom TileProvider implementation to provide the tile images. See the API docs for TileOverlay. In our software, Mappt for Android tablets, we have used the tiling system to load both local and ...


2

it seems you can use a &z=nn parameter now Try this: <iframe src="http://mapsengine.google.com/map/u/0/embed?mid=zYk_BmXXTdxw.k83snDbX5SJc&z=9" width="745" height="480"></iframe>


2

Adding another layer with some markers and making invisible worked perfectly for me. You can keep the new map style too with custom markers etc!


2

OpenLayers.js: i would recommend you to download the lib and link it to your application server. This way you can have total control over its URL and content. "insecure content" warnings: that happened to me too. In OpenLayers 2.13.1, when you instantiate an OpenLayers.Layer.OSM, it is configured by default for HTTP. From OpenLayers.Layer.OSM doc: url ...


2

One presumes you are already familiar with Section508.gov but those who may find this later may not be. For general accessibility resources see The Accessibility Project although that is primarily focused on web accessibility. For more cartographic specific accessibility tests consider the Colour Contrast Analyser and Vischeck.


2

Unfortunately the answer to many of your questions is tied into the history of the USGS mapping program and decisions made, reversed, and reimplemented along the way. I don't know the specifics for that exact scale option, nor a more current version of the resource mkennedy mentions. I stumbled across a pdf earlier from I thought 2011 where a USGS official ...


2

3D is not (yet) implemented in QGIS, but you can store the height in an attribute table field and create a 3D output manually with ogr2ogr -z_field fieldname outside QGIS. See Is it possible to create 3D dxf with OGR? for an example. This is rather 2.5D, because all vertices of a line must have the same elevation (as contours have). In QGIS, you could use ...


2

I don't see why ASCII Art should be unsuitable for Cartography. Art subjects can range: from the most common such as people and landscapes; to the outright ridiculous like a toilet or an unmade bed (that's Modern Art for ya!). In terms of ASCII Art, maps can be drawn fairly accurately. Just depends on the resolution required and the amount of time ...


2

The actual answer is a mixture of the other answers/comments you've already received. MySQL is limited I see from the tags you're using MySQL, the problem is, it can only do bounding boxes until 5.6, not the actual geometries. http://dev.mysql.com/doc/refman/5.0/en/spatial-relation-functions.html If you want to use the bounding box: SELECT * FROM `test` ...


2

From the longitude and latitude coordinates, you can create spatial structures (Points) in your (spatial) database, like PostGIS. (see ST_GeomFromText) Instead of your bussId | longitude | latitude, you would have a bussId, Point database called BussSpatial. You can then just query the following var request = 'SELECT bussID FROM BussSpatial ...


1

The bounding box query for SQL is(Using PDO) $sql ="SELECT bussid FROM tablename WHERE(latitude BETWEEN ? AND ? )AND (longitude BETWEEN ? AND ?)"; $stmt = $dbh->prepare($sql); // Assign parameters $stmt->bindParam(1,$minLat); $stmt->bindParam(2,$maxLat); $stmt->bindParam(3,$minLng); $stmt->bindParam(4,$maxLng); WHERE parameters come from ...


1

I think your problem is related to this question, this answer and this bl.ock. at least one issue is that you haven't defined #infowindow_template, but you can get a simple onclick popup of the country name by adding the following: cdb.vis.Vis.addInfowindow(map, layer.getSubLayer(0), ['name']); in place of: sublayer.infowindow.set('template', ...


1

I found the problem, I added ol.interaction.Select({condition:ol.events.condition.mouseMove}) which prevents map dragging. The vector-layer.html example solves navigation issue with mouseover interaction


1

This is a link to Google's documentation on how to allow users to draw polygons and other shapes on a map: https://developers.google.com/maps/documentation/javascript/drawinglayer The basic steps are: Add a drawing tool to the map. https://developers.google.com/maps/documentation/javascript/examples/drawing-tools Add a listener event for when the ...


1

solved It: function calculateArcPointsGeo(center, radius, startAzimuth, endAzimuth, segments) { var pointList = [], point, i, d = radius / 1000, // d = distance in km R = 6371, // km, R = earth's radius (mean radius = 6,371km) lat1 = deg2Rad(center.Y), lon1 = deg2Rad(center.X), ...


1

Not a complete answer! I don't know how to identify what areas had 1:25,000 mapping done. You might try searching the Federal Register based on the information below. USGS published Maps for America (3rd edition, 1987) by Morris M. Thompson. On page 109, it states "By 1978, published 1:24,000-scale topographic maps were available for about 70 percent ...


1

colorbrewer will address colorblindness: http://colorbrewer2.org/ for web based, best bet is too follow w3c standards: http://www.w3.org/TR/WCAG20/ for native, you should reference the operators site, for example, i know ios a11y information is up on apple's site, and the same for microsoft


1

The official OSM tile servers don't provide any access via SSL. They are shared public goods and shall not be used by apps with heavy traffic. If you want to use them anyway, you must be ok with the "some content isn't encrypted" message at the browsers. If you want to have full encryption, you need to pay for commercial map CDNs with SSL: ...


1

Here is a link to TIGER by the US Census Bureau. The link below contains a shapefile for all the counties in the USA. ftp://ftp2.census.gov/geo/tiger/TIGER2013/COUNTY/ The link below is a Military Facilities shapefile they maintain. It should at least have boundaries for the installations you are looking for. ftp://ftp2.census.gov/geo/tiger/TIGER2013/MIL/ ...


1

So the problem with the code was that the id field for the shape file and for the csv file were defined as character (Thanks to Mark Weber for this observation). The new code is: library(micromap) library(rgdal) library(ggplot2) setwd ('C:/Users/Jesus/Dropbox/linked maps/Chapter4') mexico<-readShapePoly("mexstates.shp") gdp<-read.csv('mexico.csv') ...


1

It looks like you have used a Clip option on the Data Frame tab of your Data Frame properties for the data frame that you are using as your overview. The ArcGIS Online Help describes Clipping the Data Frame. Change its current setting to No Clipping and I think you will see your Extent Indicator in its entirety.


1

The map lite doesn't have a zoom, but I did find that if you go to the map, zoom in to the level you want it at and then set up the embed settings, you will get the zoom level you want.



Only top voted, non community-wiki answers of a minimum length are eligible