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1523
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location Ukraine, Kharkov
age 26
visits member for 2 years, 3 months
seen 2 mins ago

GIS Engineer.

I use QGIS, ArcGIS, PostgreSQL/PostGIS, GeoServer, Leaflet.

skype: a.hast


Nov
19
comment Modifying “pg_hba.conf” file to listen local TCP/IP conection
putting a line listen_addresses = '*' in postgresql.conf and restart your server
Nov
18
awarded  Nice Answer
Oct
24
comment QGIS - Identify overlapping polygons in single layer
Try convert polygons to lines (Vector - Geometry tools - Polygons to lines) and then create point layer from line intersections - Vector - Analysis Tools - Line Intersections. You receive points in intersections where line of one polygon feature intersect anotheк polygon feature. Then select overlaping polygon create spatial query using point and polygonal layers and you receive selected polygonal features which have overlaps.
Oct
24
revised QGIS - Identify overlapping polygons in single layer
add more tags
Oct
24
suggested suggested edit on QGIS - Identify overlapping polygons in single layer
Oct
24
answered QGIS - Identify overlapping polygons in single layer
Oct
23
comment OpenLayers not showing map from WMS layer in GeoServer
and add " map = new OpenLayers.Map". Example geoserver.geo-solutions.it/edu/en/use_ol/ol_map.html
Oct
23
comment OpenLayers not showing map from WMS layer in GeoServer
Error in URL of GeoServer: "localhost:80803geoserver/thesis/wms" - 80803geoserver
Oct
20
comment Splitting a shapefile into many shapefiles with open source
I avoid this troubles to add next code: <code> fileConn<-file("/rscript.sh") writeLines(c(strOGR), fileConn) close(fileConn) system('/rscript.sh')<code>
Oct
16
answered Visualization of a field in Leaflet
Oct
16
comment Check/uncheck overlays in groupedlayercontrol.js
if app should open with Heatmap and Geometries on, and the others off - use option 'layers: [Geometries, Heatmap]' in L.map and delete '.addTo()map' options from this layers.
Oct
16
comment Visualization of a field in Leaflet
I have a similar situation - point data stored in PostGIS database and I need display heatmap of this points in web. I write shell script (put in cron for automatically update raster if changes values in points) which make next: 1. convert data from PostGIS table in local csv file (x,y,value) 2. using gdal_grid command I receive TIFF raster from values of csv file (invdist interpolation algoritm). 3. this raster clip by polygonal shapefile (gdalwarp command) 4. and new raster publish in GeoServer via WMS and connect them in Leaflet map
Oct
16
comment Splitting a shapefile into many shapefiles with open source
Hi Lee! I'am try use your script, but receive some troubles: I create in CentOS .sh file with content <code> #!/usr/bin/env Rscript library(foreign) dfBlocks = read.dbf("/source/farms.dbf", as.is=TRUE) strTract = unique(dfBlocks$name) for (i in length(strTract)) { strOGR = paste( "/usr/local/bin/ogr2ogr -overwrite -where \"name='",strTract,"'\" /destination/ /source/ farms -nln ",strTract,sep="" ) print (strOGR) system(strOGR) } <code>. When I run this script I receive only one first object from initial shapefile in destination folder.
Oct
15
revised Clip raster by shapefile in parts
add example
Oct
15
comment Clip raster by shapefile in parts
@til_b Thanks! I added in your answer example of script.
Oct
15
suggested suggested edit on Clip raster by shapefile in parts
Oct
15
accepted Clip raster by shapefile in parts
Oct
14
asked Clip raster by shapefile in parts
Sep
30
awarded  Explainer
Sep
26
awarded  Popular Question