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What time resolution is used for the maps?
The maps show data of four different resolutions in time: daily (24-hour), monthly, annual and climate period (30-year) data.
Why are not weather, snow, water or climate maps visible when “Imagery” or “Topography” is activated?
"Imagery " and "Topography" are imagery layers which are superimposed on the snow, weather, water and climate maps, and have to be deactivated in order to be displayed on top.
What are the coordinates and scale shown?
The displayed and used coordinates are in the Universal Transversal Mercator (UTM) zone 33 projection and coordinate system. These do not always match local topographic maps (e.g the national N50 topographic maps at scale 1:50000), which for some areas of Norway are provided in other UTM zones.
What is observations maps and forecast maps?
Forecast maps are the results from model runs aiming at prognosis the development into the near future. Observation maps are the results from interpolated or simulated fields based on observations.
Which browsers are best suited seNorge.no?
seNorge.no is best shown on Internet Explorer 6/7, Mozilla Firefox 1.5 or Opera 9.
Why does "Today" show the date of tomorrow?
According to World Meteorological Organisation (WMO) protocol, met.no and NVE, is time-stamping the observations with the same data as the day the observation was carried out. Precipitation and temperature are observed at 7 a.m. (8 a.m. during summer time) and daily data and maps cover the preceding 24 hours. For forecast maps the 24-hour period is forwarded to end at 0 a.m. For example, the forecast map of 15. January covered the 24 hour period from 0 a.m on 14 January to 0 a.m. on 15 January.
How far ahead may I find data?
Daily data are normally provided one day ahead in time, in other words covering tomorrow.
Why are some maps white?
If no map shows up this is typically because no map is generated for the selected theme and date.
What is the difference between fresh snow amount and fresh snow depth?
Fresh snow amount show the quantity of snow fall received during the previous 24-hour period in mm water equivalent, which is the depth of the water layer produced if this amount of snow melted. Fresh snow depth is the accumulated amount of fresh snow that has fallen during the previous 24-hour period only. Fresh snow from previous days is not included.
How to use navigation tools?
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Zoom in: Activate tool. Draw rectangle of the area of interest on the map and release.
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Zoom out: Aktivate tool. Draw rectangle on the map. Existing map extent will be resized to the drawn rectangle.
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Pan: Aktivate tool. Move map extent by pulling.
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Recentre map: Aktivate tool. Push once at the location where the new map centre should be.
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Show Norway. Push at tool to resize and fit map to show the entire Norway.
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View graph or data from observation stations. Activate tool. Push once at the centre of the area where you are interested in displaying data. All locations with observations within 40 km of the location are displayed in a popup window. You will have tick off NVE and/or met.no stations in the list of reference layers to the left of the map.
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How to use search functionality?
Search for place names. An asterix (*) can be used as a wild card at the end of a partial name. The search looks for place names in the place name database of the Norwegian Mapping Authorities. Some names may not be found here.
How may I show updated snow maps using WMS calls?
Use the following WMS (WMS is an acronym for Web Map Service) call to show the most updated snow maps:
http://arcus.nve.no/WMS_server/wms_server.aspx?VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG:32633&FORMAT=image/png&BBOX=-472725.577380953,6438682,1480197.57738095,7943687&WIDTH=545&HEIGHT=420&LAYERS=fswwk
In order to show other snow themes, substitute the string "fswwk" with other parameter codes:
- swepr" shows Snow amount in percent
- "swerk" shows Snow amount ranked
- "swewk" shows Weekly change in snow amount
- "sd" shows Snow depth
- "fsw" shows Fresh snow amount previous day
- "fswwk" shows Fresh snow amount previous week
- "sdfsw" shows Fresh snow depth previous day
- "qsw" shows Snow melt previous day
- "qswwk" shows Snow melt previous week
- "lwc" shows Snow wetness
- "ski" shows Ski conditions
- "qtt" shows Sum of rain and snow melt previous day
- "qttwk" shows Sum of rain and snow melt previous week
Maps for other dates may be shown by adding the following string ”&TIME=YYYY-MM-DD” to the end of the WMS call, where YYYY-MM-DD expresses the selected date. For example, 2006-11-10 shows the map 10 November 2006.
It is possible to display a geographical subsection of the maps by changing the four values in ”BBOX=-472725.577380954,6438682,1480197.57738095,7943687”. The values are provided in the map projection and coordinate system defined by UTM zone 33. The first value defines the East-coordinate and the second value the North-coordinate of the lower left corner. The third value defines the East-coordinate and the fourth value the North-coordinate of the upper right corner. It is important that height-width ratio is equal in the map sub-section and the sub-image displayed. This is defined in the string ”WIDTH=545&HEIGHT=420”.
How may I show updated weather maps using WMS calls?
Use the following WMS (WMS is an acronym for Web Map Service) call to show the most updated weather maps:
http://norgenacloudy.oslo.dnmi.no/wmsmapserv?SERVICE=WMS&VERSION=1.1.1&FORMAT=image/png&SRS=EPSG:32633&REQUEST=GetMap&BBOX=-472725.577380954,6438682,1480197.57738095,7943687&WIDTH=545&HEIGHT=420&LAYERS=rr
In order to show other weather themes, substitute the string "rr" with other parameter codes:
- "rr" shows Precipitation previous day
- "rr7d" shows Precipitation previous week
- "tam" shows Temperature previous day average
- "tam7d" shows Temperature previous week average
Maps for other dates may be shown by adding the following string ”&TIME=YYYY-MM-DD” to the end of the WMS call, where YYYY-MM-DD expresses the selected date. For example, 2006-11-10 shows the map 10 November 2006.
It is possible to display a geographical subsection of the maps by changing the four values in ”BBOX=-472725.577380954,6438682,1480197.57738095,7943687”. The values are provided in the map projection and coordinate system defined by UTM zone 33. The first value defines the East-coordinate and the second value the North-coordinate of the lower left corner. The third value defines the East-coordinate and the fourth value the North-coordinate of the upper right corner. It is important that height-width ratio is equal in the map sub-section and the sub-image displayed. This is defined in the string ”WIDTH=545&HEIGHT=420”.
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