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JAKUB SISAK photography

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Jakub Sisak, GISP


1d
comment How to use an IF THEN statement in an sql Select expression?
I know - I also said that in my answer. However, it does work quite well and many do just that and have been doing it since version 8. It's also relatively safe if you do not alter any of the reserved GDB tables. Querying "feature class" tables and even creating joins and saving queries is fine, however accidentally altering or deleting one of the reserved tables will cause problems. Folks go to great lengths do bring real SQL functionality into GIS by creating entire arrays of Access database in custom GIS software.
1d
comment Stream Links on Topography
In order to have questions resolved you should provide as much detail information as possible. This includes detailing the approach you are using, input data, your findings, descriptions / screen captures of errors and problems, etc. This question is unclear as it stands right now.
2d
comment Digital Elevation Model Resolution
@zeynep - pixel resolution is an irrelevant parameter and independent of raster resolution. When you export a map at HIGH resolution the raster contained with the exported output will have a HIGH pixel resolution. As such you can export a 20cm resolution LiDAR DEM at letter size and 72DPI and the resulting file will have a low pixel resolution. Similarly, a coarse 30m resolution DEM exported to an ANSI E size and 300DPI will have a extremely high pixel resolution but it will not change that fact that the DEM will still be a 30m raster resolution.
2d
comment Stream Links on Topography
What is your source elevation raster? What steps have you followed to generate the stream links? In general, the stream links created from your input elevation raster will correspond with that raster.
2d
comment How to copy layers between MXD's with arcpy?
I deleted my previous "obvious" answer because no longer relevant with the inclusion of arcpy
Sep
22
comment Spatial Join Points and Polygons
What results do you get with Intersect join (the default for this tool).
Sep
22
comment Making color map in ArcGIS for Desktop?
You need to specify what type of imagery you have. Can you clarify what you mean by colourmap/provide example?
Sep
22
comment Selecting features by location based on selected feature using ArcObjects?
someone voted this down. Can you please provide reasons?
Sep
4
comment Displaying numerical values as symbols on 3D map in ArcMap or ArcScene?
Yes, you can easily do all that. Set height to attribute value as well as make the symbol size based on the same value.
Sep
4
comment Displaying numerical values as symbols on 3D map in ArcMap or ArcScene?
You mean as a label?
Sep
3
comment What are Esri's new “ArcGIS for Professionals” and “ArcGIS Pro”?
Thanks @KirkKuykendall. Didn't know it was not allowed. My rep said everyone with a maintenance is eligible. To touch on the "unusable as-is" - i did say for MY purposes. We do a lot of cartography and there is a lot of functionality missing in this area. I found the product cumbersome to use but am sure it will mature. I am hoping ESRi will be more open to end-user input. With QGIS becoming more polished with every version, which has ESRI devotees like myself giving it a serious try, the future of desktop GIS looks interesting.
Aug
29
comment How to quickly fill multiple gaps in a series of adjacent polygons
I think that may blow away some of the gaps that need to be preserved. It will also round corners.
Aug
28
comment Is it possible, and if so how, to effectively classify vegetation types using false near infra red imagery?
Great answer and interesting reading. Thanks!
Aug
28
comment Is it possible, and if so how, to effectively classify vegetation types using false near infra red imagery?
For this exercise I am using Pleiades 50cm pan 4-band (2 m MS) Imagery, geotiff converted to ESRI FGDB raster.
Aug
28
comment Is it possible, and if so how, to effectively classify vegetation types using false near infra red imagery?
Good starting point. thanks.
Aug
27
comment Labels not appearing on any layer in ArcMap?
This is a fairly common problem in ArcMap. You could have also tried running MXDoctor and defrag on the map document which often corrects such problems but not always. Starting over with a new mxd is usually a good second step in troubleshooting these issues.
Aug
12
comment 50cm imagery - aerial or satellite?
@Aaron - both. Initially the aerial. The image was clear and high resolution but prone to long shadows and similar visual deficiencies such as optical illusions (trees look higher that they are). Aerial looks good as a map underlay but we found it lacking in the "analysis" area so we recently ordered a Pleiades 50cm satellite - new collect. IMHO, the satellite image, which does include NIR, is far more suitable for GIS analysis; tree species and stands are clearer to identify, outcrop pops out, wetlands and water features easy to delineate, no long shadows and optical illusions
Jul
4
comment Is there a way to render/show ACAD drawing in ArcMap correctly?
Oh yeah. That works pretty nice! I am able to select any part of the drawing directly in CAD, save as DXF. Best part is that doing it this way, the various saved DXF's render perfectly in ArcMap - identical to the original drawing.
Jul
3
comment Is there a way to render/show ACAD drawing in ArcMap correctly?
Good Ideas, thanks. I wish I had AutoCAD with Map 3D. My TurboCAD Deluxe does not export to shapefile but i will try the DXF approach. Even Purging is an advanced option in TurboCAD.
Jul
3
comment Symbolizing File Geodatabase feature class with Layer File created from AutoCAD drawing?
As I mentioned above - can't do that. The only data source option there is a "CAD Feature Class" type. Can't even choose anything else.