The CHDK-GPS Features Table of Contents The CHDK-GPS Features Table of Contents Introduction and motivation GPS settings main menu of the GPS Settings GPS functions View Compass Show Navigation Navigate Home Start GPX track record start General settings shutdown when battery level warning in event of low battery level Audible warnings 0 - 2D-3Dfix GPSstatus Show Check for change of time zone location as act. Time zone mark Logging - Settings GPX track - time interval symbol Track log display exchange in the play-fashionto change the play mode off backlight time to end the backlight tagging settings wait until GPS signal reception [s] polling interval if signal reception [s ] change the play mode until switching to Play Mode [s] off the backlight until the end of backlight [s] Countdown - Text - Short Form Navigation - Settings damping of the compass needle compass - time interval Navigation -time interval Selectlocation for Navigate Home Copyright

Introduction and Motivation This document describes the CHDK-GPS function of the SX230 extensions in detail. You will learn not only about the CHDK-GPS settings and their functions, but also provide further information and suggest ways on how to deal with the still camera with the addition

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functions. Documentation is further based on the CHDK-Manual structure so that relevant information can easily take over from this description in the CHDK manual.

GPS Settings GPS Settings existing GPS functionality greatly expand. The GPS settings provide such functions for navigation, geo-logging a track or geo-tagging of images and much more. The geo-logging is a feature that is constantly in short intervals, GPS coordinates to GPX file on the memory card writes. These GPX files can afterwards be read by third-party tools such as Google Earth and the logged distance are displayed. The GPS Exchange Format (or short: GPX) is a standardized, open and royalty-free data format for storage of geo-data and is based on XML. For further information, pleaseto Wikipedia. refer CHDK also offers functions for geo-tag of an image. One can of course ask the question, why is this good, because every picture anyway Canon assigns a geo-tag when GPS signal is available. But here there are two points where CHDK intervenes: 1 "When GPS signal is available", and 2 "A geo-tag"point. to a Who knows this situation is not: You want to photograph something but also have the geo-tag to the end and waits for the GPS signal. Particularly unpleasant it is when other people have to wait until the photographer took the picture. Therefore CHDK offers the opportunity to make the picture (even without a GPS signal), simply wait a while (until GPS signal is available), then stores the GPS coordinates into a GPX file when GPS signal is available and then turns off the camera2. to point "a geo-tag". Generally provides GPS coordinates to two qualitatively different: One is a 2D coordinate that specifies only a point within a plane and a 3D-coordinate, which still saves the additional height. Anpeilen for the 3D coordinates of the GPS device must be much more satellites, and is thus much more accurate than the 2D coordinate. If one makes for active GPS signal a picture, so does the Canon firmware is the coordinate, which is currently available. With CHDK, you can just set it, which coordinate to be stored.Geotags as waypoints in a GPX file, similar to the Geo-Logging written. A waypoint consists for example of the coordinates (longitude, latitude), from the time of the height, etc. CHDK but offers also the possibility of a pre-made picture, which is equipped with GPS Coordinates For navigation. This example is useful if you do a hike and want to make sure that you find the car again. It makes only brief a picture from the parking lot and may start. Besides, CHDK can also find a compass.

In addition to these major enhancements CHDK offers even smaller gadgets such as the bring-me-home function or a time zone warning, so you do not forget to travel to customize the clock or time zone. These functions are customizable in the General settings.

Main menu of the GPS Settings GPS features Turns GPS features, which are described below, either completely off or releases the GPS functions. [In, out] unlock the GPS features. Default: off

Show compass

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Selecting this menu item displays the compass. For this feature to work, it is necessary that: ● GPS_Kreis.txt sdcard directory \ CHDK \ Data lies ● in GPS_Pfeil.txt sdcard folder \ CHDK \ Data isand ● the cameraGPS there is receiver,if Compass Show was once selected, it changesthe menu to Complete Compass. Color meanings of the compass: Red: No GPS signal available Yellow: GPS 2D coordinate stream is received Green: GPS 3D coordinate stream is received there are still some adjustments to the compass on the navigation . - Settings Note:The camera is mounted no real compass. The compass only works when you move, because it is calculated from the final coordinates. If you stop and turns on the spot, then the result is false. There are still some adjustments to the compass in the menu navigation settings.

Show Navigation CHDK offers the possibility of an image that is equipped with GPS Coordinates For navigation. For this feature to work, it is necessary that: ● GPS_Kreis.txt sdcard directory \ CHDK \ Data lies ● in GPS_Pfeil.txt sdcard folder \ CHDK \ Data isand ● the cameraGPS receiver is present ● an image is selected, the GPS coordinates includes Navigation starts by looking in the play mode switches the camera and an image can be displayed on the display, which includes GPS coordinates (Tip: CHDK can alsothis using a GPS viewicon).Then you call the CHDK menu and select Viewmenu.If Show Navigation was once selected, the menu changed to Completenavigation.Alternatively switched on at the camera from simple. During navigation points of the compass arrow, which now appears on the display, in the direction in which the destination is located. Also appearing on the display: 1. 2. 3. 4. 5.

distance from the target (air line) approximate time to reach the target current speed march toward the target direction

Note:Can be displayed until the approximate time to reach the goal first need some data is collected and may be delayed by this display come. Note:items 4-5 only work with movement. Note:..while to an active navigation and normal images are made,the color meanings of the compass arrow corresponds to that of the compass, there are still some adjustments to navigation in the menu navigation settings.

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Navigate Home Start This function works similarly to shownavigation. First, it uses its unique location in the home menu navigation.Is it relatively easy: Simply select this menu item in the CHDK menu and off you go. Tip:The best change before or while you use this function in the play mode of the camera so the camera retracts the lensthis. make ● ● ● ●

feature to work, it is necessary that: GPS_Kreis.txt sdcard directory \ CHDK \ Data lies in GPS_Pfeil.txt sdcard folder \ CHDK \ Data isand the cameraGPS receiver is present in a home location menu navigation settings is set .

During navigation points of the compass arrow, which now appears on the display, in the direction in which the destination is located. Also appearing on the display: 1. 2. 3. 4. 5.

distance from the target (air line) approximate time to reach the target current speed march toward the target direction

Note:Can be displayed until the approximate time to reach the goal first need some data is collected and may be delayed by This display will notice...4-5 until only work with movement,the color meanings of the compass arrow corresponds to that of the compass, there are some settings menu in the menu navigation settingsway.

GPX track record start CHDK offers the possibility of a to login. The Geo-Logging is a feature that writes continuously at short intervals, GPS coordinates to a GPX file on the memory card. This menu item starts the recording of the way. The GPX file is stored on the memory card under sdcard \ GPS \ Logging. With each start, a new GPX file created specifically for this Yymmdd-hh-mm.gpx format.These GPX files can afterwards be read by third-party tools such as Google Earth and the route is displayedlogged when GPX track record start time was selected, the menu item changes to GPX track loggingstops.Alternatively, you can switch the camera off easily. Note:The user is independently responsible for managing GPX files responsible. This means that CHDK creates these files and they also cost space on the SD card. There are some settings for navigation in the menu logging settings.

General Settings

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shutdown when battery level Has implementedsince CHDK some GPS features, the automatic shutdown due to low battery state by preventing the Canon firmware, this item was introduced: CHDK CHDK calls during these GPS functions are active periodically as the battery level. . If the battery falls below the set value, it switches off the camera CHDK [0-99]% in value selection (default: 25) Audible warning when battery levellow to is toolow battery level is CHDK beeps. If this option is activated, the alarm sounds in any case Regardless of themenu -.Acousticalwarnings [ON / OFF]

audible warnings of low battery. Default: Off

Audible warnings when CHDK camera based on a GPS function (eg after receiving a GPS signal) turns off automaticallyso spend CHDK to request a multi-second intervals like beepissued. [ON / OFF] determinedif Audible warnings be or not. Default: From 0 - 2D-3D fixthis setting, you determine exactly how the coordinates should be, which CHDK works. In particular, this setting isfor geo-tagging. used It means the setting: ○ ALWAYS that always exactly one waypoint per image in the GPX file is written, even if there is no GPS signal. CHDK writes immediately after creating an image of a waypoint in the GPX file. If no GPS signal is present at the time of writing the waypoint course can only be properly registered for this waypoint time - as a coordinate CHDK contributes 0.0 for a Long and Latitude. Note:CHDK remembers when as a 0,0 coordinate was written, and overwrites the 0.0, when GPS signal is present. Prerequisite: Camera is not turned off. Note:This also works when multiple consecutive images are made ​ for allimages takenthe. ○ 2D(default), that once there is at least a 2-D coordinate, or a waypoint for the images taken in GPX file is written. Note:.requirement is that the camera is not turned off between the image and createGPS ○ 2D/3Dreception,that once there is at least a 2-D coordinate, or a waypoint for the images taken in The GPX file is written. However, CHDK is waiting at this setting until a 3D coordinate exists, overwriting the 2D coordinate of all waypoints again with the 3D-coordinate, as soon as possible. Note:is a requirement that the camera is not switched off ○ 3D that waypoints only to pictures taken will be created when a 3D-coordinate is present. [ALWAYS, 2D, 2D/3D, 3D] selection value. Default: 2D Show GPS Status Selects to this menu item, then a small GPS icon is displayed. By as displaying different colors in the recording mode, the status of the GPS receiver is displayed in playback mode is different, the color of the icon, which geo-tag for the image was stored:

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recordingmode: ○ Red: no GPS signal available ○ Yellow: GPS signal is available, but no altitude information, ie, 2D coordinate ○ Green: Best GPS signal available information including height, ie 3D coordinate Playbackmode: ○ Red: No geo-tag for the displayed image available ○ Yellow: 2-D coordinate of the displayed image available ○ Green: 3D coordinates for the displayed image available Note:In playback mode will be considered only if Canon a geo-tag in the exif has written data of the image. It does not check whether and which coordinate CHDK in the GPX file is written. [ON / OFF] satellite icon is displayed or not. Default: Off to check the time zone change CHDK offers to consider the possibility, if you look at 7.5 degrees east or west has moved since the last marked position. This is useful so you do not forget to put the camera to the correct time zone. Note:CHDK does not really have time zones, but only checks a fixed value (7.5 °) at a predetermined point. If this is exceeded, this indicates CHDK, if this option is active. The test takes place once every time the camera as soon as it receives a GPS signal. If the time zone is exceeded, a warning will be displayed. [ON / OFF] to test time zone on or off. Default: off site as a nude.timezone Mark CanWith this option you can mark your current location, that it is used as a location for the time zone test. Note:For setting the time zone function, the camera must have a GPS receiver. Note: The location is stored in a GPX file on the SD card under sdcard \ GPS \ TimeZone \ timezone.gpx

Logging - Settings GPX Track -time interval Thisis set to one, is written in the interval after which a waypoint in the GPX file. The shorter the time interval, the more accurate the recorded value. However, this causes the battery drain and it occupies more space on the memory card. [Second] time interval between two waypoints. Default: 1 seconds View icon for track recording This menu item displays a small globe icon when you start recording the track. CHDK only starts with the letter of coordinates in the GPX file when a GPS signal is present. Once the writing takes place, in addition, a small red dot appears, would show the writing on the memory card (in the GPX file). [ON / OFF] displays an icon for the track record. Default: Off switch to the Play mode CHDK can (while logging is active) cause an automatic change in the playback mode when logging in record mode starts. The advantage is that the lens is retracted and thus it has less battery consumption. You can also store the camera with recessed lens back into the bag. Note:You can always independent force of the automatic change a manual change to USA.CHDK-GPS features

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Playback mode, where you press the play button of the camera. Note:The tagging settings provide a similar setting, but is completely separate settings. Note:.You can start logging directly in Playback mode [ON / OFF] From

to switch automatically switches to Playback mode on or off. Default:

time to change the play mode CHDK can (while logging is active) cause an automatic change to Playback mode. . This setting gives you, as long as the camera is in record mode before it switches to playback mode, the condition that the feature works is that changes in the play mode is active. Note:If you change the playback mode to shooting mode while logging is active, the time is rewound to change the play modeseconds. [seconds] default is 10

CHDK Turns in the prescribed time automatically in playback mode,

off the backlight in order to To maximize battery life while the logging function, CHDK offers the possibility to switch off the display completely. The display is switched on again when any key is pressed for longer than one second. Note:The display is turned off only in playback modenot.. [ON / OFF]

If turning off the backlight on or Default: From

time to endbacklight to maximizeTo conserve battery life during the logging function, CHDK offers the possibility to switch off the display. The display is switched on again when any key is pressed for longer than a second. This setting gives you how long the camera, the display can be activated before it shuts off the display. Requirement that the feature works is that switching off the backlight to ON. stands [seconds]

CHDK Turns off after specified time the backlight. Default: 15 seconds

tagging settings If GPS is enabled in the camera and also GPS signal is received, the camera automatically saves each image to a geo-tag, and that this is directly from the Canon firmware in the Exif information of image written. Looking at the picture with the appropriate programs such as Picasa, so you can see where this picture was taken. CHDK expands this function still a nice feature because the made ​ ​ CHDK can write each image a geo-tag in a GPX file , where the geo-tag is stored as a waypoint called. The waypoints are grouped together in a common GPX waypoint file per daywaypoint. Here is an example and an explanation to a
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Waypoint iswith the XML wpt initiatedtag,with Latitude(lat)and Longitude(lon)of latitude and longitude areheight. elegant is the(Note:Since the height is given as 0.00, this is a 2Dcoordinate), time corresponds to the system time taken when the picture was taken. GPST is the time returned by the GPS receiver when the GPS receiver has delivered the geoday. Furthermore, it is still the name of the stored image(name)and the temperature of the lens(temp). This GPX waypoint files can ultimately integrate with third-party tools such as Google Earth can show graphically where each waypoint on a card is market. shown,in contrast to the CHDK firmware Canon now have another feature that should currently be unique on the If at the time of creating the image is no GPS signal available notes, so the first CHDK information such as time, name and temp, and soon created a GPS signal is available, a complete waypoint entry into the GPX waypoint file. It CHDK waits until either a 2D or 3D coordinate is received. It is based on the time and GPST see how far the point of creating the image and the time of the geo-tags apart. It can be seen in the example above, that the picture was taken at 6:31 clock and 15 seconds (this is currently set system time) and the geo-tag was removed by 4:32 and 7 seconds (this is the time that the GPS . receiver returns and the time zone shift corresponds to 0 So there is a two-hour shift, the geo-tag was removed so the above example, 52 seconds after creating an image, or said another way:.. Could take one image from the outset with an active GPS signal want, so you would have to wait 52 seconds, which can be endless, especially when you take in other people. CHDK does is this advantage that the motion within the time between capturing the image and taking the geo-tagged low or negligible is. Is it very fast, for example, by bike or car is no longer the theory. So you can set exactly how long to wait for the CHDK GPS signal, because at some point it makes no sense to needs and the battery charge is not well. the way, theperiodto wait time and GPST nearly identical when GPS signal is present at the time of recording. The question now islike this again waypoints from the GPX waypoint file in the Exif file . of the picture come this does not CHDK should be mentioned, however at this point, how to do There is a free tool Geosetterit..This assumes just such tasks with Geosetter one first selects the directory where the images are and .. then press CTRL-G can now be selected, what are the GPX waypoint files and that's it will do the rest Geosetter: He now compares the file creation date to the time at the waypoints, if between two not more than one variable. time, is classified Geosetter the two pieces of information. all found information pairs shows Geosetter clearly, and with a confirmation writes Geosetter the geo-tags in the Exif information of images. As already mentioned above, can these geo-tagging function in CHDK correspond tailored to your needs: wait until GPS signal reception [s] Here you can specify the maximum waiting time, the CHDK is waiting for GPS signal reception CHDK turns the camera off after this time. Note:. Time begins at

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eachpressing anew when the button is pressed for 1 second [seconds] 300 secondsGPS.CHDK on the camera in the prescribed time will automatically default. polling interval if signal reception [s] isWith this option set, how often CHDK for Receive investigated during CHDK on GPS reception awaits the lower the value, the more they will demand, the higher the battery draindefault:.. [second] time interval for querying the GPS sensor, 5 second change in the play mode CHDK can ( .. while CHDK is waiting for GPS signal) cause an automatic change to Playback mode advantage is that the lens will retract and you then have less battery consumption is also possible to store the camera with recessed lens back into the bag. Note:You can any time regardless of the automatic change a manual change in the playback mode to force, in which you press the play button of the camera. Note:The logging settings provide a similar setting, but is completely separate settingsTurns. [on / off]

an automatic change in the playback mode on or off. Default: From

time to change the play mode [s] CHDK can (while CHDK is waiting for GPS signal) which causes an automatic change to Playback mode This setting gives you. . how long the camera in shooting mode remains before they go into playback mode requirement that the feature works is that changes in the play mode is active. Note:If you change the playback mode to recording mode while logging is active, the time is rewound to change the play modedefault:.. [seconds] 30 seconds

CHDK Turns in the prescribed time automatically in playback mode

off the backlight To conserve battery life during the tagging maximize function, provides CHDK the opportunity to display in playback mode, turn off the display is switched on again when any key is pressed for longer than one second. Note:.The display is only in playback mode offOFF. [ON / ] fails to switch off backlight on or not. From time to end the backlight [s] Default:.To conserve battery life during the logging function to maximize offers, CHDK the ability to turn off the display, the display is switched on again when any key is held longer than one second. This setting specifies to how long the camera, the display can be activated before it shuts off the display. requirement that the feature works is that switching off the backlight to ON. stands [seconds]

CHDK Turns off after specified time the backlight. Default: 45 seconds

countdown - text - short while CHDK on GPS reception is waiting for the photographer text displayed with a countdown of how long the camera still actively trying to get a GPS signal and thus to

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a geo-tag. This text can optionally be reduced using this menu option, insofar as that only the countdown is displayed on the screen and saves space. [ON / OFF] long text

ON only the countdown show with no additional text. Default: off, so

navigation -settings damping of the compass This setting can prevent the compass jumps too much. The higher the setting, the less the compass jumps, but also the slower it becomes. [1-40] values ​that are used for averaging. Default: 7 Compass - Time Interval This setting specifies how often (ie in the time interval) that the compass is to take a reading on the compass[.. Note:The smaller the value, the more accurate the compass, the higher the battery consumption second] time interval for compass-reading collection. Default: 1 second navigation - Time Interval This setting specifies how often (ie in the time interval) that the compass is to take a measurement of the navigationdrain.. information,the smaller the value, the more accurate the navigation, the higher the battery [second] time interval for navigation, measurement-taking.one secondslocation: default. mark a location forHome Navigate CanThrough this option you can mark your current location as home If you have set the site once, you can alwaysto Navigate home starting navigatefrom the GPS settings screen, to the set location. Note:This setting of the home-site works, the camera must have a GPS receiver. Note: The location is stored in a GPX file on the SD card under sdcard \ GPS \ Navigation \ home.gpx

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