NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
>From: "Jacob" <address@hidden> >Organization: >Keywords: 200601111850.k0BIo67s026357 IDV satellite zoom Hi Jacob- > Hey, I changed the memory level from 512MB to 300MB like you suggested >and it seems to be working alot better than before. Thank you for that >advice. Glad the helped. >I wanted to ask you a couple of quick questions, first about the >Satellite displays. I notice that when I display a satellite image, for >example, of the GOES-East Visible, and I zoom into a region, like the >Southeast US, The pixels are very blocky and the resolution is not that >good. However, when I looked at a screenshot of IDV, the one you have in >the Users Guide, where you zoomed into south Florida, showing a Visible >satellite image snapshot of Hurricane Charley in Florida, the resolution >looks terrific. How would I be able to get the resolution of a satellite >image that good when I zoom that close into a region? When you use the Image Data Chooser, you can set a center point and a resolution. The IDV has defaults for various products and for the GOES-East Visible, it does a magnification (blow-down) of -2. for the entire image. For higher resolution, change the Line/Element magnification to 1. By default this will give you the entire image, but you can subset by setting a center lat/lon point and a smaller size. The Hurricane Charley image used a different dataset that has 1km resolution (perhaps GINIEAST/1km Visible), but was subset using the image chooser with a specific lat/lon, full resolution and a particular size. Note the RTIMAGES/GOES-East Visible image has a maximum resolution of 4km, so you'll always get a blocky image when you zoom in. We are looking at updating the image displays to automatically retrieve higher resolution data as you zoom in (like the background image display does), but that is just on our wish at this point. > Also, is there a way to display contours of current weather conditions >in IDV, I often check out the Metar Surface Data, but can you turn those >observations into contours, like temperature, dewpoint, etc.? If so, how would I go about doing that? We do not have an objective analysis capability in the IDV, but again that is in our plans, but we have no target date or resources for that task. Don Murray NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.