Performance concerns how effectively a computing system uses resources.

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2
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0answers
28 views

ITopologicalOperator2 operation Simplify taking very long in ArcGIS 10.3.1

I have a method that does a simplification of geometries. I have used this common code since ArGIS 9.2 without issues and it still works fine in ArGIS 10.2.2. Recently I upgraded a project to 10.3.1 ...
3
votes
1answer
72 views

Why does arcpy.ListFeatureClasses() take so incredibly long?

I'm having an issue where calling arcpy.ListFeatureClasses() in a workspace with 400 shapefiles takes a very long time (more than 10 minutes). Using the os module to achieve the same effect takes ...
0
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0answers
8 views

Level of detail options for drawing features in Open Layers 3?

I am drawing various level sized features in Open Layers 3. When drawing State boundaries, performance barely drops perceptively, but, it drops horrendously when drawing county layers. Is there a ...
0
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0answers
14 views

ArcMap labeling performance using Citrix or RDS?

We have virtualized ArcMap in both Citrix and Remote Desktop Services environments. In both Citrix and RDS, when viewing a MXD that has a good amount of labels, the rendering is very slow. On a ...
0
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0answers
29 views

QGIS Slow to Save to Network Drive

Do other users find that QGIS is very slow when saving to a Network Drive location? Saving locally is instantaneous, saving the QGIS project to the network takes over 1 minute every time. Saving the ...
1
vote
1answer
49 views

Performance Improvement of Postgres vs PostGIS

I am trying to run the following query thousands of times per second to determine which is any polygon contains the passed in point. SELECT * from areas WHERE poly @> ? Poly is the name of the ...
0
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0answers
19 views

Querying through QueryTask takes more time if it has large number of data

Whenever I query my layer with queryTask it always returns 1000 maximum records. This makes to return the results very slow. Is there any alternative for queryTask to increase the performance of ...
0
votes
1answer
97 views

Building Large Network Datasets from OpenStreetMap in ArcGIS?

I'm trying to build a "large" network dataset from OSM data in ArcGIS. Doing it all at once is taking a "long time" and seems like there is a big opportunity for it to fail at some point which would ...
3
votes
3answers
108 views

Spatial join with HUGE datasets

How to make a spatial join with ArcGIS with these HUGE datasets? Target: almost 3 million squares 500x500m size (the attribute table is basically empty) Join feature: 12000 polylines Operation: one ...
3
votes
1answer
173 views

Map-server Very Weak Performance Vs Geo Server - Why?

I search for a good wms server that support Postgis at the end I found Mapserver as the fastest and best choice. Every performance test say it's faster than Geoserver because of its native compiled ...
1
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0answers
39 views

What is the fastest way to select oldest, unique geometry from a table containing duplicates in PostGIS?

I have an output from an ArcPy arcpy.Union_analysis operation and for the overlap polygons that were created I need to select out the oldest feature (along with the attributes). The result is 75740 ...
1
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0answers
67 views

Understanding Number of Feature Classes vs Connection Time with Enterprise Geodatabases

So here's the situation - at the moment I am having a problem where the more feature classes I load into a ArcGIS 10.2 enterprise geodatabase in PostgreSQL, the slower the connection time becomes. I ...
1
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0answers
54 views

ArcPy reading a raster in a moving window?

I typically read large raster data using gdal and setting up a moving window of 256*256 pixels (for example). I recently had to do some processing using arcpy, so I did the same thing, using ...
4
votes
2answers
189 views

Fastest way to numerate intersecting polygons in ArcGIS

I need to numerate a thousands of polygons in groups, so each group will get unique number. Every intersecting polygons is unique group (see picture). So polygons have field "groups" with values: ...
0
votes
4answers
175 views

Is there a site with templates for Arcpy where I can just fill in the blanks?

I have a Shapefile containing near 7000 pour points across the globe (GCS, WGS84). I'm using the following model to select the first feature point of the Shapefile, copy the selected feature in a new ...
0
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0answers
34 views

How to Make Model with Iterate selected feature run faster?

This question is related to this one : Model with Iterate selected feature not working. What's my mistake? The answer provided by worked great, but it’s really slow. Any way to make it run faster? ...
1
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0answers
62 views

What is the reason for the very poor performance of ESRI's file geodatabases on network drives?

I am asking this question because I am at a loss and dont have a good enough understanding of all the underlying operations going on 'under the hood' of Windows/Arcgis. What is the root cause of ...
3
votes
1answer
82 views

Is there a way to reduce tile processing from Openlayers 3 when user pan & zoom a lot?

I have 2 overlays with local tiles (xyz) on my map. When the user zoom in / out and pan the map intentionally a lot, the app becomes very slow because OL tries to render all the tiles it was requested ...
2
votes
0answers
23 views

Making Tile Service fast in ArcGIS Server for Silverlight Viewer?

I am publishing a tile service in ArcGIS Server but when I call it in ArcGIS Silverlight Viewer it took a lot of time to open completely, and panning is very slow. What should I do to make my app ...
0
votes
0answers
8 views

Performance: Reproject Cache vs. Drawing Vector data in correct projection

I have quite a bit of data that I am caching from UTM to Web Mercator. This is fine, but I have another process that automatically creates map book pdfs. These map books have been setup to read the ...
0
votes
1answer
63 views

Georeferencing CAD drawings

I am trying to Georeference CAD Drawing in ArcMap by adding the Control Points. But it is taking a long time to load the CAD file. I could not do snapping and every time I hover over the mouse, it ...
2
votes
2answers
94 views

Why the execution of a query is very slow using PostGis?

I'm applying this Query to 8257800 point but it's taking 15 hours and it didn't return a results. SELECT a.gid , b.gid, st_distance(a.geom,b.geom) FROM shp1 a, shp2 b where ...
1
vote
1answer
50 views

Taking a long time to load tables from oracle to QGIS

My workplace has an oracle database with a very large number of spatial tables. Therefore, it takes a long time to load the oracle connection in QGIS. Does anyone know how this could be speed up?
0
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0answers
23 views

Spatial filter taken more time for running any other way to improve speed

I had number of buildings in data (around 600000) i want to check if any building captured less than shape area 25sqm should snap to existing building. i have used spatial filter but it is taken more ...
3
votes
2answers
161 views

Efficient ways to read table data from a large feature layer?

I have a feature layer that contains about 460,000 records and it currently takes about 20 minutes to read that table using the arcpy.da.TableToNumPyArray() tool. Is there a more efficient way to read ...
2
votes
1answer
75 views

Is there a way to improve the time for opening a QGIS project?

We have a QGIS project using postgresql database "made with" osm2pgsql. The database is about 68GB. Our Configuration is : AMD-FX 8 cores @ 4.7Ghz 32 Gb RAM 500 Gb SSD (read/write 600Mb/s) Ubuntu ...
0
votes
0answers
15 views

Improving Global Scene transition when changing location using bookmarks in ArcGIS Pro?

Using ArcGIS Pro 1.0.0 I have: Created a new project using Global Scene.aptx Switched the Basemap to National Geographic Navigated to and created Bookmarks for some countries of different sizes: ...
0
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1answer
28 views

How to make Feature to Raster tool run faster

Suppose you have a feature class that you need to convert to a very detailed raster (where each cell size is quite small). With a cell size of 0.0092908447 in the Feature to Raster tool, the procedure ...
0
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0answers
68 views

Lizmap recommended layer settings for performance (faster navigation)

I am currently using Lizmap and I really love it. There are a great bunch of options available which makes it pretty customizable. The only "but" I can mention is speed. My map seems to be loading ...
1
vote
1answer
56 views

Performance is downgrading with multiple feature datasets design for ArcGIS?

My company develops a spatial planning solution since 2009. Initially it was an ArcMap application to create and maintain spatial plans (competing with AutoCAD folks) but recently we developed ...
1
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0answers
74 views

Why is SAGA kriging slower in QGIS than in SAGA itself?

I'm using QGIS for a while. In my opinion the SAGA kriging tool (processing toolbox) is very slow. Is that an QGIS issue? I tried to interpolate a point layer with 300.000 points (I know it is big) ...
2
votes
2answers
113 views

Performance Monitor of ArcGIS for Desktop?

Is there a way/tool that could basically report what ArcMap 10.2 is doing? I can't really explain it, so I will show you what I mean. Now mind you it doesn't have to be exactly like this. ARCMAP ...
1
vote
1answer
142 views

How can I speed up a slow ArcGIS Server 10.2 - PostgreSQL (9.2) ST_Intersects query?

I am troubleshooting a slow st_geometry query in Postgres 9.2 that uses ST_Intersects--a basic Select from table where ST_Intersects type query. table_extent ...
1
vote
0answers
47 views

Mapnik performance - large polyline dataset

I'm working with a very large set of polylines - contour data - to be rendered with Mapnik. (The contours are generated using gdal_contour from SRTM data.) At present I'm storing them in PostGIS and ...
0
votes
1answer
59 views

Display more than 1000 lines on web map

I've a scenario that I need to display many lines on the map (for instance all road links of Manchester in UK). I am using Leaflet as map plugin. I use geoJSON as source of data, when I try to load ...
3
votes
0answers
114 views

Performance difference between focal statistics (ArcGIS) and neighbor (GRAS or QGIS)

I tested minimum, maximum, and average neighbor (circle radius = 161 pixel) using ArcGIS, GRASS and QGIS: ArcGIS (10.1): it takes only one minute GRASS (6.4.3): it takes 123 minutes for every output ...
4
votes
1answer
100 views

PostGIS: Strategy for fastest select by BBox with an ORDER BY polygon area clause. Cluster?

Update 2 (below) suggests 14% of the table geometries are stored out-of-line with the rest of the table records. This may be a useful clue. The Problem: We've got a table with appx 170,000 WGS84 ...
-1
votes
1answer
82 views

How to reduce Overpass way QL statement output to just tags?

I am new to Overpass API. Ran this query [way(around:10.0,37.559391,-122.301529);out;] in overpass-turbo.eu and getting lot of information about nodes. I just need to know whether it is valid way or ...
0
votes
1answer
61 views

ogr2ogr Spatialite to csv very slow

I am using ogr2ogr to extract point data from a Spatialite db to a csv file:- ogr2ogr -f "CSV" commandtmp.csv dtm2.sqlite -lco GEOMETRY=AS_XYZ -progress -explodecollections the Spatialite db is 7GB ...
1
vote
0answers
110 views

Spatial query by ESRI ST_Geometry take too long

I am using ESRI ST_Geometry in my application, and I found that the spatial query is rather slow: The following sql is used for query pois inside a certain bounding_box: select * from ( select ...
0
votes
0answers
51 views

Showing large number of polygons in SpatiaLite on Android map?

I have 2,300 complex multipolygon features in an offline SpatiaLite database. How can I show them on an Android map without slowing the map to a halt?
1
vote
1answer
465 views

How to improve ArcGIS Desktop 10.2.2 and Postgres 9.2 PostGIS geometry performance?

I'm experiencing sever performance issues on a polygon featureclass(PG_GEOMETRY) in a PostgreSQL 9.2 database from a 10.2.2 client. Even when zoomed to an area with 10-20 features within the extent. ...
1
vote
1answer
73 views

SQL query within Select tool in ArcGIS model going very slow

I have been working on finding the shortest routes from a series of residential blocks (a shapefile with polygon centroids) to a a number of recreational areas. I have a total of 9 resulting OD cost ...
1
vote
1answer
24 views

Avoid sending CSS with each search in CartoDB

We’re developing a project with CartoDB and we want to show each element with a custom image. We are doing this setting the sublayer.setCartoCSS() with something like this: cartocss: "#map { (…) } ...
0
votes
1answer
178 views

GeoTIFFS on Geoserver are served slowly, at too low resolution

I have a bunch of large, high resolution GeoTIFFs, that I am serving using GeoServer. I also have a prototype client I wrote using Leaflet. The resolution of the TIFFs is quite high, but despite that ...
2
votes
0answers
59 views

QGIS extremely slow to clip vrt on Mac

I've been using QGIS 2.6 (Brighton) happily for awhile but suddenly it became extremely slow during certain operations, after being reasonably fast in past use. I'm merging NAIP JP2 files to virtual ...
0
votes
0answers
51 views

Performance problem WMS layers arcgis Server

I am learning to work with ArcGIS for server and with Javascript, HTML5 and CSS3. I have GIS knowledge but this technical part is new to me. I have published WMS layers to my ArcGIS server and can ...
0
votes
0answers
31 views

Multibuffer in arcpy is too slow?

I have to make multibuffer to a several shp's (30 or +) and with this code the it takes 30 minutes or more. import arcpy,time,glob,os def multibuffer (probe,Zona_trab,nombarch3,recortes2): ...
2
votes
2answers
240 views

Python Script tools for ArcGIS 10.2 is very slow (get raster properties)

I am using python script tools for ArcGIS 10.2, under Windows 8.1 64bit. When I am using the arcpy.GetRasterProperties_management() command, it's very slow to process the data. For example. I tried ...
0
votes
1answer
284 views

Chrome/Firefox Performance Issues

Just curious if anyone else is having performance issues with Chrome and Firefox while using an arcgis javascript web application. I have been developing an application that works great in Internet ...