Category Archives: Data

Hiding the map= parameter from a map server application

Posted on 11.02.10 by Morten

In the mapserver documentation, one is told to use a cgi-wrapper script to hide the map= parameter. Then there is shown a script to use on ‘any system having a /bin/sh’ I tried to rewrite that as a php-script to … Continue reading →

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How to make a bar graph with a split Y axis in R

Posted on 08.02.10 by Morten

There is a function, gap.barplot for doing that in the plotrix package, but I was not happy with the way the result looked, so I started out making my own way using subplot in the TeachingDemos library. I have gutted … Continue reading →

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Setting up a mysql database for spatial data

Posted on 29.01.10 by Morten

I would prefer to use postgis, but have to resign to mysql. I want to create a table with spatial information and be able to access it from mapserver. As I am going to store a lot of datapoints, they … Continue reading →

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Query a layer in mapscript php

Posted on 28.01.10 by Morten

When learning to use mapserver and mapscript, the first steps have been to display, zoom and pan. Zooming and panning is quite easy, it is just a line like $map->zoompoint($zoomfactor,$clickpoint,$map->width,$map->height,$mapextent); where $map is a mapboject, $zoomfactor is a number telling … Continue reading →

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Selection from a mysql/ogr layer in php mapscript

Posted on 27.01.10 by Morten

A little phpsnippet for filtering out items from a layer. I have a layer “mobil” which may be on or off. This layer consists of a number of dataset collected at various times. There is one field ‘visible’ that is … Continue reading →

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svn copy problem

Posted on 11.01.10 by Morten

Being a bit to eager when cleaning up a repository, I managed to remove a file too many from revision control. I still had the file sitting around, so I just readded it – but then the revision history had … Continue reading →

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Snøpakking…

Posted on 25.12.09 by Morten

Snøfreseren gav opp i går formiddag, dvs var nok sikkerhetssplit som røyk, men jeg har ikke funnet ut av hvor den sitter, men fant ut at kryddervogna (spice, eeh, space wagon 4×4) hånderte 30 cm våt snø overraskende bra og … Continue reading →

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Parsing json array using uLkjson

Posted on 22.12.09 by Morten

Back into delphi7… Needing to transfer some data over the net from a server to my delphi application, it seemed like a good idea to use JSON and according to json.org there are no less than three libraries for parsing … Continue reading →

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ECEF – lat/lon conversion

Posted on 24.11.09 by Morten

I needed to do a ecef (earth centered earth fixed) to lat lon conversion in delphi. Following the formulaes found in Wikipedia the following procedure was made: procedure ecef2latlon(X,Y,Z : extended; var lat,lon,h : real); // returns lat with 6 … Continue reading →

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Undeleting in Linux

Posted on 11.11.09 by Morten

På Norsk I accidentially deleted a lot of files from a memory card (xd-card, but the type shouldn’t matter). As I am only running Linux at home, the commersial solutions for windows that turned up on google were not usable, … Continue reading →

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