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Jakub Sisak, GISP


Jun
1
comment Adding LAS files (or derivatives of) to mosaic error in ArcGIS
What is the LAS version? Only 1.0, 1.1, 1.2, and 1.3 are supported.
May
29
comment Producing building shadows?
Also - so true about the current state of ArcGIS bug fixes... Fortunately As ArcObjects are being updated, ESRI increments them with numbers, add functionality, change things, but also, most importantly, leave the older versions mostly untouched.
May
29
comment Producing building shadows?
Thanks @whuber! I understand rings, segments, etc. Thought this is a great script and I saw the python thread inspired by this post as well. I am well versed in ArcObjects so I was trying to think about a possible ArcObjects solution. Just wanted to make sure I understand the "loop over rings" bit -specificaly how the shadow is constructed. I think I do. In avenue zero area polygon being dissolved with others may not be an issue but I am pretty sure ArcObjects will throw an error - may have to test for it which will add processing time. Surprising avenue could handle it!
May
29
comment Producing building shadows?
@whuber - Nice! I know this is an old post and I also don't really understand avenue... I am also not familiar with what do you refer to "loop over rings" Do I understand correctly that for each segment in the ring you create a small 4-vertex polygon by offsetting the the fist and second then subsequent pairs of the ring's vertices by the value in the xy variable? All then gets merged to form the connected shadow? Assuming this is what's happening, what happens when the 4 vertices form a polygon with no area? Does the union succeeds?
May
28
answered How to set up a 3D plane in ArcGIS?
May
28
answered Characters displaying correctly in FGDB with ArcMap 10.1 now displayed incorrectly with 10.2 — font coding issue?
May
28
comment ArcGIS 10: Create an event linear layer from a point layer based on directionality
@mr.adam - great idea with the left and right buffers! If OP is familiar with ArcObjects it is possible but not easy to build left and right buffers using IConstructCurve3:ConstructOffset. It involves constructing the left and righ polygons programatically from line segments. Similarly, the same could be done in ArcMap with editing tools by offsetting lines left and right then converting completed outlines to polygons. In any case, let's assume the road segments do not correspond with the road signs in which case a combination of your idea with moving vertices to roads and splitting is needed
May
27
comment ArcGIS 10: Create an event linear layer from a point layer based on directionality
Do the sighs have any other attributes besides speed? I am asking because there could be something that can link the signs to the roads. Otherwise, what you want to do is not possible without manually snapping the signs onto the road segments, transferring attributes and splitting the road segments. (you could do this programatically but the distances are variable so full automation may not be possible) The result will not be a stand-alone table but rather an attribute table to which all of this information will be transferred.
May
27
comment ArcGIS 10: Create an event linear layer from a point layer based on directionality
Are there any other attributes stored with the road signs? Sounds like you will need to snap them to the roads first then somehow transfer directionality of the road to the road signs then cut lines by the vertices and transfer attribute values from signs to each segment. Just an idea. Might help if you posted the data.
May
26
comment Make permanent layer in ArcMap, Image Analysis Functions to display hillshade
I've been using the same techniques described in the linked article without any issues. I experience no loss of quality when i export. Can you add more info and provide visual examples? All i can think of is that your input data is low resolution and it appears (correctly) as if you were seeing loss in quality at large scales.
May
26
answered ArcGIS symmetrical difference in arcgis desktop standard
May
23
answered Lake Maps with changing water levels
May
23
revised Calculating volume with Cut Fill tool
added 1361 characters in body
May
23
comment Create a raster map from more than one shape
A: You maintain fetatures relative to scale by setting the reference scale in Data Frame Properties. (scale only has meaning when printed or viewed at correct paper/layout sizes) B: You can gain detail by increasing the resolution of the export file. Because the exported image will be georeferenced, you can add it to map and export to a raster at your desired "exact" resolution
May
23
comment Calculating volume with Cut Fill tool
I believe you are not correct. The net loss (400) is already a sum of the 2 cells. NO need to perform any further calculation. The resulting change (in this case increase) is 100.
May
23
answered Calculating volume with Cut Fill tool
May
23
answered Create a raster map from more than one shape
May
20
comment SPOT NDVI resolution
"resolution is definitely not 1km" what is the resolution in raster properties?
May
20
comment Why is my add-in toolbar greyed out?
2 different answers below suggested you try to start an edit session to see whether the event will enable the toolbar buttons. Have you had a chance to try this?
May
16
asked ESRI Basemaps - World Imagery: Is it possible to bring certain imagery into foreground (change the viewing order)?