Latest Contributions by MichaelGibson2

‎12-22-2021

So I tried to convert into a JPG instead, and suddenly things started to work. I was also looking at an old post https://support.esri.com/en/technical-article/000009157 and realised that the JPG must store its spatial ref in the auxiliary PAM (Persistent Auxiliary Meta) file. So a hop, skip and a jump and tried to create a PAM file for the geoTiff, and that does indeed work. This seems strange as geoTiff is capable of storing this information internally; So I'm still not sure if GDAL stopped producing the auxiliary file (but this does seem unlikely since it stores in within the geoTiff itself), or if ARCGis runtime has stopped reading it from the geoTiff... does seem strange. So I guess I'll try to find way to force GDAL to produce the auxiliary file... Or does anyone know of a way to force ARCGis runtime to load from the geoTiff file. Currently I'm using: Raster myRaster = new Raster(outFilePath); RasterLayer newRasterLayer = new RasterLayer(myRaster);

‎12-21-2021

I had a method which was working, which used GDAL to convert an ASCII grid raster into a geoTiff, and add a spatial reference so as it could be loaded into the ArcGis Runtime. I was using GDAL 2.4.3, and ArcGis Runtime 100.8, but coming back to my code a year later it doesn't seem to work now. I'm getting a null spatial reference when loading the geoTiff. If anyone has any useful suggestions at this point, i'd be most grateful

‎12-21-2021

It would appear that my work around using GDAL to convert the ASCII grid into a geoTiff has stopped working... Upon closer inspection it appear that 100.8 stopped reading the spatial reference (projection) of my converted geoTiff. At this point I don't know if its GDAL or ArcGis Runtime, but I didn't expect either to change without updating the version. I wonder if there are any updates in this area?

‎05-28-2020

Thanks again Michael Branscomb‌ Yes the rasters do have a time element, as its a flood scenario. Although at present I'm mainly worrying about creating the animation through a series of time slice rasters. So can the LocalServer (or maybe LocalMapService) pass the data to the map for the purposes of such an animation? I don't supposed you could provide some code snippets to do this relatively simple procedure? I guess I'll need at how to implement the local server/local map service to do this. cheers

‎05-26-2020

Thanks for your continued support Michael Branscomb‌ It would seem that 'animation' presumes you have all the images before the animation begins... In actual fact, I have a flood modelling system, for which I'd like to show the outputs, and because of this I won't have the rasters until they are produced by the model. Thanks for clarifying the localServer a bit more. Would the local server be able to load the the ASCII files into data and pass that to the map, which would be quicker and more effecient than converting them with GDAL. I'm still trying to get the colours right in another post, but again because this will be model output, the size and number of rasters could vary. Although the number of rasters, would mainly depend on what the system can push through in a given time, thus my questions of the efficiency of loading/converting/passing data etc. Cheers muchly

‎05-25-2020

So I found a work around for the time being, whereby for loading the ASCII, I'll just use GDAL to convert it to a GeoTiff format. Although this seems terribly inefficient. For the animation, that would be even more inefficient it would seem. I had a quick look at the LocalServer and LocalMapService, but this would seem you need to have users install and run the separate program that is the LocalServer? Is this correct? Is no way to pass it the data, if I've already loaded them with something else like GDAL, or lets say generated them? many thanks

‎05-25-2020

Does any have any ideas how to set the colours for a raster as above?

‎05-20-2020

I'm trying to set up a simple colour banding for a raster, and struggling, can anyone offer any advice? I have a raster with values between ~0.01 and ~1.01, and would like to use a scale of blues... seems simple. Should look like this on ArcMap: which is based on: I've looked at the colourmapRenderer, StretchRenderer, and BlendRenderer, and struggling to get anywhere near this. Probably the closest I've got is with the StretchRenderer, where I've achieved: Clearly this is the pre-set colour ramp "Elevation" many thanks, Mike

‎05-15-2020

2D initially, although its certainly interesting to consider the 3D options. many thanks

‎05-14-2020

Thanks for your reply. I think there will be two main questions/uses I'm thinking of: the first being that we will often need to load the ASCII formats, and the second I'm considering an animation by showing a number of raster one after another, for which I have the data in memory, and again it would seem fairly inefficient to send it to the disk only to be reloaded. I'm currently using an encapsulated WPF form within my .NET windows forms app; which intend to migrate up to WPF at some point soon. Having a bit of look around ArcGIS Runtime Local Servers, and LacalMapServices, and LocalGepprocessingServices doesn't look too simple; Could you give a quick example for the purpose of 1. loading an ASCII file 2. passing data? Many Thanks Mike

‎05-12-2020

I am surprised to find that ArcGIS runtime only supports a very limited set of raster formats: Add raster data—ArcGIS Runtime SDK for .NET | ArcGIS for Developers Supported raster formats ArcGIS Runtime supports a subset of raster file formats that ArcGIS Desktop supports. The raster file formats ArcGIS Runtime supports include the following: ASRP/USRP CRF DTED0, 1, 2 GeoTIFF HFA HRE IMG JPEG JPEG 2000 MrSID, generations 2, 3, and 4 NITF PNG RPF (CIB) RPF (CADRG) SRTM1, 2 Mobile mosaic datasets I'm trying to import an ASCII grid format Esri ASCII raster format—Help | Documentation Which is basically an ascii text file, which looks like: NCOLS xxx NROWS xxx XLLCENTER xxx YLLCENTER xxx CELLSIZE xxx NODATA_VALUE xxx row 1 row 2 ... row n Having a brief look around, I find only a few threads of help. :Importing ASCII raster files 04-Nov-2016 07:32 Hi, In the current v10.2.X release we don't have a specific raster data type or layer to handle these, you'll need to use the Local Server and a Geoprocessing Package to convert the ASCII raster into another raster format and then use the result map service to render that. In the upcoming v100.0 release we have added a raster layer which can reference raster files on disk. Here's the list of supported types: Add raster data—ArcGIS Runtime SDK for .NET (Quartz Beta) | ArcGIS for Developers. If your app regularly has data coming in in ASCII format then you can still use the LocalServer to convert to one of the supported types above. For more info on the Local Server see Work with local services—ArcGIS Runtime SDK for .NET | ArcGIS for Developers Which I'm a bit confused about... It is not possible to process a conversion in memory, or is the only way currently to convert the file and open the new converted file, as this would seem terribly inefficient. Is there no way to create a raster object and pass it the memory, and use something else to actually load these files? many thanks Mike

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Date Last Visited	‎12-22-2021 01:16 PM

My Ideas

Latest Contributions by MichaelGibson2

Re: Problem loading spatial reference of raster

Problem loading spatial reference of raster

Re: Importing Raster Data

Re: Importing Raster Data

Re: Importing Raster Data

Re: Importing Raster Data

Re: Raster Colour band

Raster Colour band

Re: Importing Raster Data

Re: Importing Raster Data

Importing Raster Data