We all know: Black is beautiful. So is this map from Andrew Zolnai. But besides the stunning Stamen toner background map he also shows the significant amount of 260.000 points on one map: historic logbook entries of ships.
I looked for a program to draw circles of a pre-defined radius around some points on earth I had the coordinates from. A quick search returned the website GPS Visualizer, and I absolutely love it! It is not only a great free website to convert GPS data in formats that can be used in GoogleMaps, GoogleEarth, jpgs and many other formats, it also allows you to customize maps very easily. Plus, you can use a large number of different maps as base data layer. It looks like the site has been created to deal with tracks and waypoint data, but…
Dear folks, most of you probably know how to map things using software on your pc. Some of you might also know cartoDB. We like their service as our job-page here on digital-geography.com is based on their tables, API and GeoJSON export functionalities. Additionally it’s for free (with some limitations)… The guys from CartoDB now offer an online learning event which will give newbies the chance to map their data in a very interesting online mapping engine.
A short time of my day I am watching twitter like others are zapping the TV. A short time ago, there was this list out of nowhere: “the 100 most influencial geospatial people” which was published by OPENGEO. Is it a cultural thing, is the GIS business more developed in the US? So many questions when looking on the map that I’ve made wit the data provided by OPENGEO: SO what about all the people given so much input to QGIS, the spanish guys and so on? I mean the influences are not only coming from selling GIS, right? How…
The leaflet API is very simple and tries to deliver best performance and style for commonly used features like tilelayers, points and lines and markers in general. So when we would like to visualize points it is possible to have a very large numbers of points. So lets have a look on such an basic example. I’ve created a point shape file with QGIS which has approx. 1.000 points embedded. Let’s have a look on a normal webmap with this density of information: As you can see, we’ve inlcuded a second js file with the point information called points_rand.js. You…
In our last session we started with some topographic “pre”-map as we prepared everything to create a printable map with QGIS which shows heights in a special area. As the map creation itself is somehow very detailed I’ll show you just basic steps so can go into detail with typo and positioning for yourself.
In this tutorial I would like to show you, how to create a topographic map and analyse topographical data using freely available SRTM data and QGIS including some data manipulation. This is part one explaining how to get data, remove missing values, explore the relief and changing the color representation of a TIF file obtained by the USGS.
The new JSON Format GeoJSON allows you to easily embed geographical features in your leaflet webmap. Additionally you can create it very easily in the open source GIS QGIS aka Quantum GIS. In this tutorial I’ll show you how to export features to GeoJSON from QGIS and embed them into your leaflet map.
The new google maps is now in sort of a Beta and availbale on invitation. Let me share some of the new features with you: As you can see, you will have much more space available to see pictures on the map. What I like most is the very reduced implementation of search results as they are shwon in the lower part of the map and you will not have thes ugly markers scattered all over the map anymore: But let’s go a little further and have a look on the routing engine: In the new google maps engine you…
As I have seen today on engadget Youtube presents now a new Trend Map where you can see what viewers in the US like to see on Youtube. At the moment it seems to be the True Blood Trailer for Season 6. But the more interesting part is the analysis of metadata of the viewers: you can select different sexes, age groups and cities. Furthermore you can easily see, that older people tend to have a more diversified watching habbit.
In our first post we concentrated on the creation of a table in leaflet and simple ways to administer our data and to embed the map in a webpage. Today we will consume only the table with Leaflet.
In this tutorial I’ll show you, how to combine text information with spatial information using the open source software QGis. You can easily download and install QGis from the following Source: QGIS DOWNLOAD PAGE.
Due to our recent merge of geo-works.de and geo-affine.org we asked ourselves: Wouldn’t it be great to have a view of the origin of visitors of the blog? So where are they from?
In the last tutorial we have created a very basic web-map using OpenLayers and one web-mapping service from OpenLayers itself. In fact using OpenLayers seems to me like consuming WMS layers and combine them to a new map. In the next example I would like to show you, how to add a second layer which contains some labels of interest.