Andrew Map selection

My web presence

Saturday, 14 June 2014

From static to dynamic web maps, my travel so far

I tell people "I know just enough java to be dangerous", and it has served my well in my prior attempts logged in my old web page. These were all Google Maps API v.2 I built about 5 years ago. This blog as well as my new map catalog showed how I built maps in QGIS then ArcGIS, and then posted them on giscloud.com and AWS via Mapcentia GeoCloud2. I recently posted maps on arcgis.com on desktop and smartphone, static results of 'traveling salesman' geoprocessing on the desktop or online.

Time-aware maps are a very handy way to boil down complex data sets that involve time component. I did this on the desktop a while ago - to reduce the CLIWOC maps of ships captains logs from 1650 to 1850 into dynamic layers, rather than arbitrary decade time slices - and posted them more recently on arcgis.com as map packages and mashed them on AWS with golbal vector shorelines.

Now we can post time-aware maps directly to arcgis.com, and I thought I'd try it first on my popular Where in the World is Andrew map - I related my peregrinations so often ("do you want the short or the long version?") that I made a simple map using a text file and Java script on Google Maps. My new catalog blog relates why and how I tried in on ArcGIS Online, and how I found an unexpected benefit: to explain an arcane mapping concept of Great Circles to my family, as illustrated below.

click image to enlarge.
This first step to create a time-stamped web map will be chronicled in my companion  catalog blog and is posted here:



Footnote: tools I used list in a catalog here and specifically for my blogs:
  1. ArcGIS Home Use, ArcGIS Online and Amazon Web Services have modest fees
  2. QGIS is free, wheras ArcGIS Online and Amazon Web Services had free tiers
  3. beta testing gave me free access to GeoCloud2, giscloud.com and 1SpatialCloud 
  4. part of Volunteered Geography are free data such as Wilson's list and UN Data

Saturday, 10 May 2014

Handy maps

[Update 3: see the traveling salesman problem executed for just a portion of it.
Update 2: see the traveling salesman problem executed for the post code area.
Update1: see the social map created from this on a custom arcgis.com account.]

A 'handy' is what Germans call a mobile or cell phone. I uploaded free ArcGIS for Android on my  smartphone, which now has a decent screen to read maps on - love my Navigon Europe on it, and Google Maps too - but here is a quick&easy application of arcgis.com for the rest of us. 

Sunday, 30 March 2014

... now HOW open is open?

A lot of (virtual) ink has flowed around opening up data, as in this blog, GISuser crowdsourcing open data (below left) etc. etc. And everyone is getting into the act, from White House (below center) and Whitehall (UK Cabinet Office) to the number of open data hits (below right).

Sunday, 16 March 2014

Sunday, 23 February 2014

Global Sailings (1662 - 1856, English, Spanish, Dutch, French) revisited

I originally extracted CLIWOC (CLImatological database for the World's OCeans) ship captains' logs ships locations over a decade ago, to demonstrate the processing of 250K+ points in ArcGIS desktop using then new File Geodatabase. Five years later I posted this on my old website with instructions how to use it in  old ArcGIS Explorer and KML, and then I put a layer package on arcgis.com - both related historic details like de laPerouse's demise below, the importance of data standards and metadata, and the interst it generated elsewhere - more recently I posted a time-based variation of same, where using a time slider helps clarifiy complex data on desktop GIS.

Tuesday, 11 February 2014

Sunday, 2 February 2014

Map catalog page 4

My map catalog also works well to post new projects: added British Geological Survey web mapping services to East Anglia web map, in order to compare historic and current geology. The Snapshot format also give a variety of viewing options of the catalog.

Sunday, 26 January 2014

Map catalog continued

In my ongoing suite of posting webmaps in my new and fresh Mind the Map blog, here is another take on loading global vectore megadatasets but this time on Amazon Web Services direct via Mapcentia's GeoCloud.

Saturday, 18 January 2014

Standards & Metadata, Part VIII

My previous post on this topic stated how careful documentation and appropriate metadata high-grades any information that is shared online by giving origin, context and other information. It helps build bridges and I quipped a well-known tear down this wall that also closed my second last post on free data and apps.

Sunday, 12 January 2014

More map catalog

Last week was the inaugural post of my catalog, highlighting maps from this blog in (very) roughly reverse chronological order. The second entry make the display options more evident, as this is meant to be a light and flexible version of this more complete blog. I am not about to end its success quite yet, and have no fear I will post items of substance as well as cross-links to the catalog until it has its own followers.