Latest Contributions by larryzhang1

Hi, Can you advise if latest ArcGIS Earth supports common 3D formats like point cloud (las) and mesh model formats (CC , Pix4D osgb,, esri i3s - slpk)? Any plan to do so? Regards,   ... View more

It is an issue under enterprise environment.  I guess, Esri ArcGIS Pro and relevant development teams are required to help clearify.  We may submit the remedy to tech support team for tracking .. ... View more

Hi Larry, That will only give me the values for the whole set, not per image and stretch function values. If understanding correctly, the steps for your given case should include: Select and add from MD, and/ or directly subset via �??Image Analysis�??; Applies Stretch function onto this 'subset' via Properties; Finally, try the GP tool 'Get Raster Properties' �?� ... View more

Hi! From a Mosaic Dataset i'm looking for a way to export Stretch Function values from a Raster into text, with python would be prefered. Like Band[] Min,Max,Mean values. Importing a stretch function with values works great, but i can't manage to export them. Is this information stored in binary? I have checked SDE tables but see nothing in plain text. Any Analytics function or similar i can use to get this information? Thanks! Tony, Try the GP tool 'Get Raster Properties' under Raster... ... View more

Does anyone have a solution on how to preserve image quality when importing a topo quad map into a file geodatabase. I know quality is somewhat reduced when brought into a geodatabse. Didn't know if there were any ways to improve this. Thanks. Andrew, Firstly, the raster quality is not changed significantly with the default settings, when using �??Raster to Geodatabase�??. However, you can try different parameters before loading. Pls refer to �??an overview of raster storage settings�?? from the Help. Secondly, also advisable to try raster catalog or mosaic dataset and see if it meets your needs ... View more

Hello all, I have a problem with the Raster domain tool. When it create a polygon in output, it's always shifted by a half pixel. Now I'm working with some rasters (pixel= 50 cm) What could be the problem? Thanks Giada Giada, Just verify your report and share with you as follows: [INDENT]1. It looks that the Raster Domain works OK, not shifted at all. To me, the operation involved is to buffer with �??negative�?? 0.5-m during creation of polygons, which may give us an impression �??shifting�??�?� 2. To get a polygon without buffering, advisable to use Mosaic Dataset via �??Build Footprint�?? with �??Shrink distance =0�??. Here, if your raster is very irregular, the number of vertices should be increased to maintain polygon along the real boundary, saying,  200 ~500 (rather than the default)�?�[/INDENT] Regards, ... View more

... Now my question is, why don't I have overviews generated for the master mosaic dataset? Even after building overviews, there are no additional footprints and attribute records in the footprint layer. Overviews were created for the three component mosaic datasets, so why not for the master mosaic dataset, which is a mosaic of all three? And why would creating the master mosaic compute such a small MaxPS for the 2009 mosaic in the first place? Neil, On the creation of overviews on �??master�?? MD, it can be treated as limitations or bugs, which are related to �??composite�?? MD & �??derived�?? MD from other MDs.  Pls also refer to the discussion at http://forums.arcgis.com/threads/109836-Best-Practices-Raster-Catalog-gt-Image-Service?p=390263&viewfull=1#post390263 Personally, on �??master�?? MD (with time-aware capability), it is not good idea to create overviews here, because it might �??likely�?? blend the time-serial rasters, if not done properly in operation.  In fact, it is also not one of major interests for time-aware function�?� ... View more

Neil, Firstly, it is feasible to make 2009 (0.15-m resolution) visible via �??building overviews in MD 2009�?? without changing MaxPS. For larger time-serial master MD, in fact, the creation of overviews is necessary and common in practice. Pls refer to the discussion at http://forums.arcgis.com/threads/109836-Best-Practices-Raster-Catalog-gt-Image-Service?p=390263&viewfull=1#post390263 Secondly, MinPS and MaxPS values are derived from LowPS and HighPS that control which raster will be used to create the dynamically mosaicked image at particular scales (or resolutions of the display, or image request, or the performance)�?� So, let�??s TRY your question together (hopefully, understand correctly and also explain clearly): [INDENT]From 80 converted from 270 in MaxPS in 2004 & 2013 (0.3-m resolution), the map scale to display is roughly obtained:  80*96/0.0254=310,000, which means that you can see your photos at the scales at larger than 1: 300,000 (saying, 1:150,000), without overviews. Inversely, when increasing the value of MaxPS, those images would be invisible, without overviews. In fact, on your practice, if using 1.83 from 6 or larger in 2009 (0.15-m resolution), the rasters can display properly, which means that the map scale is: 1:7,000. Otherwise, it requests higher mapping scales to display 0.15-m photos; or, the overviews in MD should be created, if the value of MaxPS increased, saying, 1.32 (4.35 feet) in MaxPS  �?�[/INDENT] ... View more

When working with many LAS tiles, the process from LAS to Multipoint is time consuming.  I have attempted the zLAS format, but I receive a "000725" error at "Output Feature Class" with no explanation about wrong file format elsewhere. Is it possible to convert zLAS to Multipoint with the LAS to Multipoint tool? John, Generally, the performance looks fine, when used to classify LAS data, which should be based on 'individual' LAS return (rather than bulk of returns) �?� ++++++++++++ On optimal use of the GP tool �??LAS to Multipoints�?? via compressed LAS, the following can be raised for consideration: Firstly, zLAS is from ESRI. zLAS is different from mainstream �??open�?? LAS standard �??LASz, which is widely supported by many solution vendors. In fact, there are also many discussions/rumors on ESRI zLAS. Pls refer to http://rapidlasso.com/2013/12/30/new-compressed-las-format-by-esri/ Secondly, it looks that 10.2 does not support its own zLAS very deeply,  �?� Not sure why not? ESRI should support �??open�?? LASz first as first priority, honestly. ... View more

Hello, I am trying to figure out how to select specific areas within a coastal prairie based on a range of RGB values.  I am using orthoimages.  I have found a few tutorials online, but nothing about selecting a range of values.  Would greatly appreciate any help. Thanks! Jeff, If understanding correctly, pls try Mosaic Dataset containing your rasters, build with overviews, and clip your AOI from this MD within Image Analysis; Then, apply the function caled 'Binary Thresholding' onto the cliped MD within Image Analysis. It will help to divide your raster into two distinct classes with the Otsu method. In this way, you can easily select water body, roads, etc. from your images covering a coastal prairie. In fact, it would be much easier and more flexible to do so via non-binary thresholding value range method, if having remote sensing package like ER Mapper/ ENVI. That is, a combination of RGB thresholding value ranges (i.e, the seperate values for R, G, B) can be allowed. Hope, MD in ArcGIS will support multiple thresholding sooner... ... View more

Good afternoon gang! I have been poking around all the ESRI resources, and didn't find exactly what I needed. We are looking at using the Image Server Extension to incorporate some topographic data sets as a basemap into our customized server site. Yes, I know there are already map services from ESRI and USGS etc that accomplish this. However, one of our requirements is that the SR of our basemap cannot be WGS 84,among other req's like owning our data etc. so there goes the cached service from ESRI Currently, we have 5 Raster Catalogs each containing a specific geographic area of custom topo map images. Soon we will have 5 raster catalogs which contain imagery in this same geographic extent as the topos. These will both grow in data over the coming years  Is it possible or recommended to store our data this way if we want to serve as a single  image service? I ask because I have not been able to figure out the best way to create a Referenced Mosaic using more than one Raster Catalog, hence why we only have a single image service for each Raster Catalog or ref mosaic. If our dataset will eventually grow to TB sizes, I would assume a single raster catalog would NOT be the way to go, but maybe I'm wrong? What's the consensus out there? How should we attack this? Collin, Firstly, there is not the best practice available to us.  Personally, how to organize image sources and manage image services are fully relied on your organization's applications and purposes. However, some technical and operational factors should be considered, before taking actions�?� On your description, it looks that your data are going to be �??time-serial�?? images covering different spatial areas (saying, area A, B, C�?�), which are geospatially located at different locations. If so, the following are listed for your reference: #1. You can manage all into �??one�?? regular Mosaic Dataset by an additional field �??Year�?? via adding �??year-based�?? raster catalogs, and then create a �??Year-based�?? referenced Mosaic Dataset on selection of �??Year�??. In this way, you can achieve the purpose of raster management. However, you couldn�??t create overviews onto this referenced Mosaic Dataset, which is necessary to serve as image service�?� #2. The �??year-based�?? regular Mosaic Dataset with its overviews, which contains all raster from different areas but 'single' year, is separately created and then combined into �??one�?? single �??time-serial�?? Mosaic Dataset (with an additional field �??Year�??). In this way, however, to properly visualize, you should use with �??Time Slider�?? function in clients like ArcGIS. Besides, the image service is not easily updated and also not flexible in diverse applications �?� #3. The �??year-based�?? regular Mosaic Dataset with its overviews containing all areas is separately created and then directly served as time-serial image service (saying, *****2014; ******2015, etc.). In this way, the services are more flexible/easier to use and also can widely support many �??diverse�?? applications like �??change detection�?? analysis and image analysis�?� With this approach, it is also much easy to update (weekly, monthly �?�), without any interruption, meanwhile customers still can access those image services �?� Finally, the use of datum/projection in 'single' Mosaic dataset mostly depends on your specific scenario, saying, those areas located in one continent/ one province /state /county, or your organization standard of spatial reference to be used in applications ... ? Hope it is helpful to you. Pls also share your practice, once done... ... View more