Janus

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GIS Newbie

	170 reputation	bio	website		visits	member for	11 months
6 badges		location			seen	Mar 26 at 19:46

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Aug 22	awarded	Commentator
Aug 22	comment	Is it possible to convert a Geoserver SLD to Quantum QML format? Thanks for your response. I tried opening it from 1.6, it opened fine. But the whole symbology has changed.
Aug 22	asked	Is it possible to convert a Geoserver SLD to Quantum QML format?
Jul 28	accepted	Does a Zonal Statistics value change when applied on a subset of data?
Jul 28	comment	Does a Zonal Statistics value change when applied on a subset of data? Thank you so much :)
Jul 28	comment	Does a Zonal Statistics value change when applied on a subset of data? Further, after reading your reply, I changed projections just to check and it returns different values for different projections. For UTM, it returned 624, for LCC it returned 456. Now, I am even more confused :). When the projection of both zones and value raster is same, should it not return the same maximum each time?. And in above case, why would it not return 624. I hope I am not doing anything wrong.
Jul 28	comment	Does a Zonal Statistics value change when applied on a subset of data? I processed 20000 polygons of the whole country initially and then picked up 5 random polygons to check if the results are same. The unique pixel values falling in polygon A are, say, 314,624,456,234. Zonal stats returned 314 as max for polygon A, which is the majority but not max. This was the case when I processed it along with 20000 other polygons. Interestingly, when the same polygon was processed with just 5 other polygons, it returned 410. Both of them are incorrect.
Jul 28	comment	Does a Zonal Statistics value change when applied on a subset of data? Thank you so much for your patient reply. I am still baffled about how the result might change for the same raster when processed with a smaller number of polygons.I used a cell size of 0.001 for raster generation.What confuses me is, if the same polygon is being rasterized internally and same number of pixels are contained in it, why does zonal stats show a value different than previous ones.
Jul 26	asked	Does a Zonal Statistics value change when applied on a subset of data?
Jul 9	comment	Select a distinct attribute with maximum shape area I am using Eliminate in Arcinfo 9.3. Even after using it, there are some sliver polygons leftover. The best chance i have to accurately remove them is to select the one with maximum area in repeating 'code' values. I have Postgresql 8.4 as well.
Jul 8	asked	Select a distinct attribute with maximum shape area
Jul 3	awarded	Student
Jul 3	comment	How to assign values to a polygon layer based on nearest point in a point layer? Also, please note that the match option "closest" is not available in Spatial Join in ArcMap 9.2
Jul 3	asked	How to assign values to a polygon layer based on nearest point in a point layer?
Jul 2	answered	Sandbars feature extraction from satellite image
Jul 2	awarded	Scholar
Jul 2	comment	How to implement a spatial query on polygon data for a specific point? Thanks a lot! Your answer pointed me in the right direction.
Jul 2	accepted	How to implement a spatial query on polygon data for a specific point?
Jun 25	answered	fTools-Error: “…invalid geometry…”
Jun 25	awarded	Supporter