Latest Contributions by larryzhang

carter, From your plot, it looks that your sparse data already are well distributed in the map. However, you are not satisified with your interpolation results (by the Wizard). Correct? If so, as said, nice to put more effort on modeling spatial relation among your data (rather than coordinate system), before using the Wizard. Honestly, on our expereince, the GA Wizard in ArcGIS offers an easy workflow for some of users. But, mostly it is not case, if only using parameters by default. ++++++++++ If your data are still not mapped into the map 'properly', because you don't know the exact coordinate system of coodinates in the data from the CSV file, you can attach and share here. ... View more

carter, Not quite clear on ‘to interpolate data from latitude and longitude points’. Nevertheless, I assume that you want to spatially interpolate data from sparse points in geodetic coordinates (Long, Lat), for example, air pollution or soil moistures, etc. If so, your measurements’ interpolation by Geostatistics technique can be done spatially in any projected or geodetic coordinate systems like local, UTM or WGS 1984 Web Mercator Auxiliary Sphere. To decide which coordinate system to use, it fully relies on the area and project you are working on (affecting your mapping accuracy only). For Long & Lat in ArcMap, pls refer to https://stuff.mit.edu/afs/athena/course/1/1.966/www/Lab4/ Secondly, if you want to make your interpolation successful, you are mostly required to ‘properly’ model spatial relationship among your measurements first, before taking interpolation, especially, with variant Kriging. In practice, running the Wizard in GA (by using the default parameters) confuses users, in most cases. Personally, this app should put some constraints ... Pls refer to the workflow introduction at  http://resources.arcgis.com/en/help/main/10.2/index.html#/The_geostatistical_workflow/003100000002000000/ Thirdly, conduct the uncertainty analysis on your interpolation... ... View more

It looks that only one sub-folder "GIS" is not visible within Pro. This is new to me . very nice finding. ... View more

On our comparison among raster and TIN imported from LAS, the classes’ results (low vegetation, median vegetation, high vegetation, etc.) from raster, which is done by ' interactively editing on DSM raster pixels', are more realistic and reliable than TIN. Before effective raster conversion from LAS (by the GP tool LasDatasetToRaster in ArcGIS), it is advisable to divide a larger LAS into small LAS files first. As said, more reliablely to classify the 'unclassified' DSM LAS data into sub-class, including ground (DTM), city model (buildings), canopy model (low vegetation, median vegetation, high vegetation), etc, it is good to work on object parameters and vegetation parameters like roughness ... ... View more

I guess, the original question is how to accurately classify /identify the classes (crown and sub-crown peaks) from an un-classified DSM LAS. ... View more

On your reply, it looks that your DSM LAS data has no classification info... If you want to manually classify this DSM into some classes, including crown and sub-crown peaks, it would be challenging  to get accurately. However, you still can do interactively editing on DSM raster pixels via programming or some editing tools in Remote Sensing packages or ArcGIS: Generally, within an Area of Interest (AOI) like a kernel of 7X7 (at least, 5X5), delete or replace the AOI with an assigned value (min, max, mean, …) for specific class, which can be carefully chose from your intensive pre-analysis on DSM raster data (after importing from LAS) ... For example, DEM Editing Tool (Using ENVI) | Exelis VIS Docs Center More commom approach is directly 'classify' DSM LiDAR (LAS) by object parameters like vegetation, saying max height for low vegetation is 2 meters, min height for high vegetation is 10 meter (see the snapshot below): Pls refer to http://www.sirwec.org/Papers/quebec/47.pdf ... View more

it looks that the extension is for 10 (?)... Pls read the doc and contact Digmap for the latest release, if available. ... View more

xiaodan, The error message looks that your ArcGIS is 10.1. Inversely, the Productivity Suites v 3.4.1 2 mostly is not for this release of ArcGIS, I guess. Pls contact Digmap team or check the documentation of Productivity Suites v 3.4.1 2 and see if it is for 10.1. In fact, you can download FGDB covering same area from Digmap. +++++++++ Digimap GIS Support OS MasterMap ® is available in a number of different formats: File Geodatabase - this is a proprietary GIS data format developed by ESRI. GML - Ordnance Survey deliver OS MasterMap ® Topography Layer in GML format. ... View more

The snapshot is invisible to me, so that I couldn't judge what you are facing. However, it looks that you should understand the following before taking actions: check if your (ITN) Layer (MasterMap Integrated Transport Network) consists of a fully 'topologically' structured link-and-node network representing the roads network; what do you expect from your conversion? In other word, how do you use in ArcGIS? For example, will you perform network analysis? ... View more

Thx, matt, Also see the challenges to CE or ArcScene, on this matter. However, my best guess is that Pro should work on it to directly support. In practice, a workaround to 3D printing of Topo map available. ... View more

pls refer to Noise Removal and Manual Classification in LAS Cloud ... View more

just find the link with operation steps at ArcGIS Help (10.2, 10.2.1, and 10.2.2) It looks helpful to solve your Q. Keep in mind that the LiDAR data classification is from data provider with LAS standard 1.1 or later. ... View more

what is the tool that you are using, ArcGIS 10.2.x or others? Has your LAS data already classified? ... View more

chris, are u aware of the schedule / plan for ESRI to directly support 3D Priting of scene (at lease, topo) within Pro, CE or ArcScene? ... View more