map page 2 - Dave's Blog


JavaScript & .NET interop via WebBrowser Control

2011 Apr 5, 10:00

For my GeolocMock weekend project I intended to use the Bing Maps API to display a map in a WebBrowser control and allow the user to interact with that to select a location to be consumed by my application. Getting my .NET code to talk to the JavaScript in the WebBrowser control was surprisingly easy.

To have .NET execute JavaScript code you can use the InvokeScript method passing the name of the JavaScript function to execute and an object array of parameters to pass:

new object[] {

The other direction, having JavaScript call into .NET is slightly more complicated but still pretty easy as far as language interop goes. The first step is to mark your assembly as ComVisible so that it can interact with JavaScript via COM. VS had already added a ComVisible declaration to my project I just had to change the value to true.

[assembly: ComVisible(true)]

Next set ObjectForScripting attribute to the object you want to expose to JavaScript.

this.webBrowser2.ObjectForScripting = this.locationState;

Now that object is exposed as window.external in JavaScript and you can call methods on it.

window.external.Set(lat, long, alt, gUncert);

However you don't seem to be able to test for the existence of methods off of it. For example the following JavaScript generates an exception for me even though I have a Set method:

if (window.external && window.external.Set) {
PermalinkCommentsjavascript webbrowser .net technical csharp

GeolocMock Tool - Tell IE9 Where You Are

2011 Apr 3, 12:00

I've made GeolocMock. If your PC has no geolocation devices, IE9 uses a webservice to determine your location. GeolocMock uses FiddlerCore to intercept the response from the webservice and allows the user to replace the location in the response with another. This was a fun weekend project in order to play with FiddlerCore, the W3C Geoloc APIs in IE9, hosting the IE9 WebOC in a .NET app, and the Bing Maps APIs.

PermalinkCommentsfiddler technical geoloc ie9 fiddlercore

Spirit of Indiana (Jones) – syncing HTML5 Video with Maps ✩ Mozilla Hacks – the Web developer blog

2010 Dec 16, 1:12Nice! Indiana Jones style map fade in over video done in HTML5 with video tag, and Google maps API.
PermalinkCommentshtml5 video map technical demo google animation svg

Damn, Tourists! « Burrito Justice

2010 Jun 7, 2:40Maps of where tourists vs locals take photos in major cities like New York, San Francisco, etc. based on geotagged photos on Flickr.
PermalinkCommentsgeolocation geo geography map flickr photo tourist technical visualization

CMAP #9: Ebooks

2010 May 10, 8:43Charles Stross on the intersection of ebooks and the publishing industry. Includes the answer to the misinformed question "why are you charging so much for access to the file your authors emailed you?" Also includes this quote on Cory Doctorow "... Cory is a Special Snowflake with EFF superpowers and New York Times Bestseller mojo which make him immune to the normal laws of man and nature."PermalinkCommentscharles-stross cory-doctorow ebook drm amazon publishing kindle apple book

Makers Market: Time Bandits Map Prop Replica

2010 Mar 1, 2:20
PermalinkCommentsart map time-bandits movie gift purchase

PeteSearch: How to split up the US

2010 Feb 22, 5:52Analysis of Facebook friend connections by US cities to determine partitioning of the US.PermalinkCommentsblog visualization facebook social map geo network graph

Bing - New Bing Maps Application: Streetside Photos - Bing Maps Blog - Bing Community

2010 Feb 19, 3:20Bing Maps blog post on their integration of Flickr photos onto their street side view. Very coolPermalinkCommentsflickr photo creativecommons geolocation bing microsoft photography map blog geo

Blaise Aguera y Arcas demos augmented-reality maps | Video on

2010 Feb 18, 4:57Bing Maps TED talk demos integration of various things including photosynth, flickr photos, and live video.PermalinkCommentsvideo microsoft map flickr 3d photosynth bing augmented-reality

Concept Art From The Legend Of Zelda - Nintendo - Kotaku

2010 Jan 29, 10:01PermalinkCommentsart game videogame nintendo zelda map design history - Protocol

2010 Jan 25, 8:31PermalinkCommentssitemap google xml search web html technical reference

A Peek Into Netflix Queues -

2010 Jan 11, 2:24Heat map of rental popularity of particular movies from NetFlix in various cities.PermalinkCommentsvisualization movie netflix map nytimes flash information

Victorian Infographics - a set on Flickr

2010 Jan 5, 6:38Lovely historical infographics. For instance, check out the topographical map of NY city from 1874.
PermalinkCommentsinformation infographics graph design history via:kottke

Official Google Blog: Go thataway: Google Maps India learns to navigate like a local

2009 Dec 18, 2:27"...this week we launched an improvement to Google Maps India that describes routes in terms of easy-to-follow landmarks and businesses that are visible along the way. We gathered feedback from users around the world to spark this improvement to our technology, and we thought we'd give you a glimpse at our thinking behind this launch."PermalinkCommentsgoogle map geography geo india

Atlas of True Names

2009 Nov 23, 2:20"The Atlas of True Names reveals the etymological roots, or original meanings, of the familiar terms on today's maps of the World, Europe, the British Isles and the United States. For instance, where you would normally expect to see the Sahara indicated, the Atlas gives you "The Tawny One", derived from Arab. es-sahra “the fawn coloured ,desert”."PermalinkCommentshumor reference map etymology translation atlas geography

PLoS ONE: Clickstream Data Yields High-Resolution Maps of Science

2009 Nov 23, 11:33A map of the sciences generated via science web portals: "Over the course of 2007 and 2008, we collected nearly 1 billion user interactions recorded by the scholarly web portals of some of the most significant publishers, aggregators and institutional consortia...The resulting model was visualized as a journal network that outlines the relationships between various scientific domains and clarifies the connection of the social sciences and humanities to the natural sciences."PermalinkCommentsvia:pskomoroch visualization science map graph

Google adds free turn-by-turn navigation, car dock UI to Android 2.0 (video)

2009 Oct 28, 8:33
PermalinkCommentsgps google android phone cellphone map

Map/Reduce Tutorial

2009 Oct 6, 3:24The map/reduce tutorial for Hadoop the Apache open source project. "Hadoop Map/Reduce is a software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) in-parallel on large clusters (thousands of nodes) of commodity hardware in a reliable, fault-tolerant manner."PermalinkCommentshadoop mapreduce java software programming opensource database distributed google yahoo apache technical todo

Google Research Publication: MapReduce

2009 Oct 6, 3:18PermalinkCommentstodo mapreduce algorithm google paper distributed database technical

How to Google Maps on Vimeo

2009 Aug 31, 4:53From Ira as part of The Balloon Project "... took the lo-fi diy map making essentials (portable helium tank, party balloons, and a disposable video camera) to Paris, France, where they launched a video camera into the sky not knowing where it would go, and created some very unique aerial cartography of the Place de la Concorde.' I'd love to see this run through photo stitching software like Photosynth and then layered on Google Maps.PermalinkCommentsmap balloon art ira-mowen france paris
Older EntriesNewer Entries Creative Commons License Some rights reserved.