PHP, the universe and all the rest - OSM

MySQL Conference talk slides

nospam@example.com (Hartmut Holzgraefe) — Fri, 15 Apr 2011 18:53:55 +0200

Slides for my two MySQL Conference talks are now available from the O'Reilly conference site:

osm2pgsql nor able to read PBF files directly

nospam@example.com (Hartmut Holzgraefe) — Mon, 08 Nov 2010 23:35:08 +0100

With the changes i recently committed to the OSM SVN repository osm2pgsql can now read OSM files in the new binary PBF format directly (with parsing code based on that found in pbf2osm). Files in PBF format are available from the geofabrik download site along with their XML counterparts and are usually about 30% smaller than bzip2 compressed XML. osm2pgsql also parses PBF about twice as fast, so substantially reducing the time taken for the first processing step.

Also part of my committed changes are an improved autotools setup that checks for library and header file availability in the configure stage already, and that only includes PBF support if the needed GNU ProtoBuffer related tools and libraries are available.

Unfortunately the PBF code requires at least protobuf-c 0.14, which is not yet part of current distributions, so you'll have to install that one from source yourself. But with proper configure checks in place you'll be at least warned about version mismatches here and osm2pgsql will be built without PBF support then.

My first JOSM plugin: Direct GPX track download

nospam@example.com (Hartmut Holzgraefe) — Mon, 11 Oct 2010 08:02:52 +0200

No more need to manually download tracks you previously uploaded to openstreetmap.org first, then opening the downloaded file with JOSMs "Open file ..." dialog. You can now pick an uploaded track and have it loaded into a new GPX layer directly with the help of the DirectDownload plugin.

You can download the compiled plugin .jar or the source code, but be warned: current status is "works for me" aka. "proof of concept".
The desired functionality is there, but it still is a bit rough around the edges.

Continue reading "My first JOSM plugin: Direct GPX track download"

Is it really that hard ...? (or how i finally learned to hate CSS)

nospam@example.com (Hartmut Holzgraefe) — Tue, 24 Aug 2010 11:09:48 +0200

I confess that i've been hiding under a stone for quite some time when it comes to contemporary HTML stuff, for most of the things i'm doing on the presentation level even good old HTML 1.0 would be sufficient if it weren't for the occasinal tabular data ...

So while i know CSS in theory i've never really looked into the black magic of doing CSS layouts and stuff ... until now ...

What i'm up to right now was to produce a small series of step by step examples on how to use OpenLayers to present customized OpenStreetMap based maps, and for that i wanted to have a simple layout like this:

Continue reading "Is it really that hard ...? (or how i finally learned to hate CSS)"

What a difference a year makes

nospam@example.com (Hartmut Holzgraefe) — Sat, 09 Jan 2010 16:18:14 +0100

After getting a Panasonic Lumix DMC-FS6 as christmas present for myself last year i today took my first try at photo mapping with Josm ... and failed.

Camera and GPS device clocks seemed to be almost perfectly in sync but i could not convince JOSM to load those issues and associate them with the loaded GPX track at all, no matter what i tried.

After double checking the photos EXIF tag entries and file system time stamps and the .gpx file entries for quite a while i finally found the reason:

The camera still believed to be living in 2009, it hat somehow forgotten to change over to 2010. The original test photos i did last year clearly show that i had set the date right, so i'm afraid i now need to remember to double check the cameras date every new year now ... :/