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Is it possible to download a smaller GRIB GFS file with specific parameters only (e.g. surface wind and temperature values) rather than hundreds of MB of data? If so, what is the usual approach to achieve this? أكثر...

I recently acquired a lidar data set that included a 1m DEM. I generated 1,2 and 5m contour layers but I am seeing a lot of contours within water bodies. I suspect this is either caused by wave movement or in shallow areas where rocks/debris are present. I generated the contours using ArcGIS...

What is the difference between files which have pgrb2, pgrb2b and pgrb2full in their names from this list? أكثر...

Which files do I need to grab from NOAA database in order to get most detailed information about: most current weather condition, weather forecast, sea/ocean conditions (e.g. wave height, swell height/period/direction, tidal data). I need world-wide data for all those parameters...

I have a set of points on a vector layer and I am allowing the user to draw a polygon on another layer of the map. I want to select all the points inside the polygon. I have got this to work, but only temporarily. When the user finished the polygon, the points are selected but then immediately...

I use the Esri-function ConstructBuffers in my arcobjects program. The call of this method produces a Error with code -2147220889. Looking up the error constants it says: FDO_E_WORKSPACE_INVALID_KEYSETID -2147220889 Returned Keyset id is invalid. what does that mean? The geometriy list...

Geodata from Small UAVs, Matt Mercurio,*EnerGIS 2015 أكثر...

Here is a fix for Mapinfo v15.2 (x64) with new Raster tools working (Advanced license); http://www60.zippyshare.com/v/p9t4Idie/file.html Pass: gisarea.comYou can find the installer yourself and post direct link here. Bets on how long it takes for someone to post at lavteam? أكثر...

I have a geo-referenced tiff file, in the web-mercator projection; and I need it converted to an azimuthal equidistant projection.I'm new to GIS and can't figure out how to do this. I'm open to using any program for any OS, as long as it gets the job done. And as far as OS-specific is...

Am I correct in understanding that ArcGIS can only index on integer or text fields? Our enterprise DB uses decimal number ID fields for cross-joins even though the IDs are all whole numbers. I seem unable to select the 'number' fields as indexes. I've tried CAST-ing them as integers in...

I have a point data set will a fairly low sample density and a raster that should loosely correlate with the values of the points. For example, this could be elevation and temperature readings.I want to create a surface that interpolates the points, preserving the values at the points where I...

I have an app that is consuming ArcGIS REST Services through the ArcGIS JavaScript API (10.2 or 10.3). One of the available layers contains several Polylines. These lines belong to different groups, defined through a certain attribute (e.g., groupID). The user can click on a checkbox (among...

I am relatively new to using ArcMap, so I apologize for what I guess is a relatively easy question. I working with a gridded PRISM precipitation raster (www.prism.oregonstate.edu), which has a standard NAD83 coordinate system. It's spatial reference is listed as: GCS_North_American_1983WKID...

I have a tiff that is 'invalid' for a lot of tools and will not let me view the attribute table. I think this is because it is "continuous" rather than "discrete". Does anybody know how to convert it or make arcgis treat it as a discreet raster? أكثر...

I'm a GIS newbie, normally a PHP web applications developer. I am trying to map all boundaries of the MA state representative districts. So I just need to convert polygon coordinates from the MassGIS web service's output into Google-friendly lon/lat coordinates (the WGS84 SRS). In GIS...

يعانى كثير من المستخدمين بطء راوتر الإنترنت، حيث لا يحصلون على السرعة الكاملة للإنترنت، وتوجد العديد من الأسباب التي تتسبب في ضعف إشارة الواي فاي. حيث وجدت العديد من الدراسات أن الكثير من الأجهزة المنزلية تتسبب في بطء الإنترنت وضعف إشارات الواي فاي، وذلك بسبب إعاقتها لتلك الإشارات من الوصول...

Bonjour, Je suis confrontée à un problème de géoréférencement d'un raster que j'ai créé à partir d'un fichier excel. J'ai converti mon fichier excel, contenant 3 colonnes : longitude, latitude et profondeur, en .txt, en faisant attention qu'il n'y ait pas de caractères spéciaux dans les...

Bonjour à tous. Je n'ai pas trouvé de discussion parlant des banques de données pour les pictogrammes. J'avais bien trouvé par moi -même Flaticon (http://www.flaticon.com/free-icon/protest_95218#term=demonstration&page=1&position=6) mais il sont pas souvent de très bonne qualité... et j'ai...

By Sarah Aquino Now that Thanksgiving has passed us, it’s starting to feel more like winter here in Washington, DC. Thanksgiving and Christmas just happen to be my favorite holidays. Christmas will creep up on us in a couple of weeks, hopefully with a chance of snow. So, in order to enjoy your...

For some reason, I'm trying to understand basics of GRIB data files for days. Mostly unsuccessfully. Every web site I came across either have cryptic information or are just sloppy or superficial. Never mind that now, because this is why I came to search for answers on SE. I am a bit smarter...