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Questions tagged [performance]

Performance concerns how effectively a computing system uses resources.

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34 views

Does power of GPU affect performance of analyses by ArcGIS Desktop? [closed]

Does the power of GPU affect the performance of analyses such as Segment Mean Shift, conversion to/from raster, etc? Is the GPU used only for caching GUI elements to give a smoother user interface ...
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8 views

Android laggy map after adding vector objects

I'm using GLMap to render over 5000 vector objects in an Android Application. Here is the framework I'm using: https://getyourmap.com/ Currently, I have Shapefiles which I convert with https://...
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21 views

Finding and fixing source of repeated seed.TruncateTask for empty string errors using GeoServer and GeoWebCache?

Googling this issue is getting me nowhere so I thought I'd cast a wide net here in the hope of getting an actionable lead on this. Our GeoServer instance is configured for GeoWebCache. While ...
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25 views

Downloading or caching web based map service for faster access?

The Western Australia Department of Mine and Petroleum allows access to one of their online systems called Tengraph Web with which I can view tenements, major infrastructure, and topography for the ...
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44 views

Is Geometry object intersect faster than Intersect_analysis in ArcPy?

I have a script attempting to identify Many-to-Many matches between two different parcel layers. It is an iterative process, during which I dissolve the selected polygons in layers A and B, intersect ...
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1answer
50 views

Distance between coordinates computation speed: conversion to UTM vs Great Circle

For a program I am writing I need to calculate the distances between coordinates. Seeing as I need to perform a large number of these calculations for each coordinate (thousands) it makes sense to ...
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1answer
63 views

QGIS 2.18: Speed up QgsFeatureRequest in Python Script

I have two input layers. The first one is a line-layer named "graph" and the second one is a point-layer named "nodes". The "graph"-layer: The graph layer holds 177350 line features which are ...
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114 views

Leaflet Mobile Performance (A Couple of Polygons)

I wrote a small Angular app with leaflet.js. In desktop browser scrolling and dragging speed is good but on mobile browser, performance is painfully. There are 8 polygon and 129 circle marker on the ...
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21 views

ArcGIS Modelbuilder model clogs up memory?

I have a model in which a zonal histogram is computed of each line in a feature class, showing the amount of cells each line intersects in a raster file. After this, this column is joined to a table ...
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1answer
56 views

Calculating euclidian distance in R between lines and points?

I have a large SpatialLinesDataFrame "o" (~500,000 roads) and ~3000 survey points "r", I'd like to calculate the distance to the nearest line for each survey point and extract relevant columns. My ...
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1answer
121 views

QGIS very slow when browsing files on macOS

QGIS is performing very slowly for me when browsing files and folders recently. I am running macOS Mojave and have no performance issues within QGIS, apart from the times I need to open or save a file....
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30 views

Testing a GeoServer “Scrolling” performance

I'm looking for a way to test the responsiveness of various layers when scrolling around the map. So after a layer is loaded and the user is moving around the map looking a specific area or whatever. ...
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2answers
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Script I made for pyQgis runs slow but can't find another way around it

registry = QgsProject.instance() first_layer = registry.mapLayersByName('buffered')[0] second_layer = registry.mapLayersByName('buffered')[0] areas = [] instrument_number = "tin_ttl_in" proprietor =...
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Controlling CityGML performance?

I tried to convert single LOD3 building using FME. I am able to convert successfully from DGN to cityGML format.But when I tried to view the same in FZKViewer/FME data inspector the performance is ...
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2answers
56 views

Running arcpy.AlterField_management 2,000 times takes too long?

I am trying to replace field names of a table stored in a file geodatabase using a dictionary as a lookup table. My field names got cut off from the Tabulate Area tool (Tabulate Area Truncates Field ...
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26 views

AddRastersToMosaicDataset_management performs slow

I have an enterprise Geodatabase (SQL Server) on my ArcGIS server machine. I perform my computations on several rasters on another machine (80 *.tif s with mean size of 50kb). When I want to add the ...
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68 views

Comparing speed of Spatial Analysis with GeoJSON versus shapefile in QGIS?

I have a large dataset that I want to perform spatial analysis on in QGIS. Specifically, I want to perform a polygon intersection analysis between two polygon layers. Given the size of the dataset ...
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1answer
186 views

PostGIS ST_Intersects is slow and doesn't seem to use spatial index

There are several threads about ST_Intersects being slow (like this one). Main advise is to use spatial index. Well I know that and created spatial index beforehand, but the query is slow nevertheless ...
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63 views

Network Has Slow Performance in SDE

I am working with ArcGIS Network Analyst (10.5.1). I created a network in SDE and everything worked fine. The network is versioned on SDE. I updated the source line features of the network in a ...
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137 views

Optimizing MySQL query to select all points with in a large polygon using spatial indexes

Re-posting it from stackoverflow as per their suggestion. Link to the thread in stackoverflow https://stackoverflow.com/questions/53182385/optimizing-mysql-query-to-select-all-points-with-in-polygon-...
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1answer
211 views

Only union/dissolve intersecting features to save time?

I have one table of about 300k polygons, some intersecting but most do not. I need to dissolve the intersecting ones and also keep the non-intersecting ones. I only need the geometries, no attributes. ...
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95 views

QGIS export selection to shapefiles is extremely slow; using only 5 to 10% CPU

I am using QGIS 3.2.3. I am trying to do some simple actions. Selecting by attribute and exporting to shapefiles. I am using a OSM file as a source which is barely 60MB. But for some reason the ...
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1answer
72 views

Speeding up ST_Value in PostgreSQL?

I am working on a large point file and am looking to get the raster value underneath each point. I am using: UPDATE Locations a SET image3b3_sum = ST_Value(rast, 1, geom) FROM image_sum_sum; 10 ...
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3answers
201 views

Which ArcGIS Online basemap has the best performance in ArcMap?

My company plans to do demos of ArcMap Add-Ins for some of our clients and we want to make sure ArcMap is performing the best it can. One of the major performance concerns is the speed of the ...
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1answer
45 views

ArcPy runs slow outside ArcMap?

I'm running a fairly small script to get height differences. The scripts gets the height in a point based on a DTM. Running the script in the ArcMap python window uses 1 min 30 seconds for 1000 points,...
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381 views

QGIS 3.4.0 Madeira: unresponsive

I "upgraded" from 3.2.3 to 3.4.0 and it's so unresponsive it's unusable. The startup time is the same as 3.2.3, then it needs half a minute to build its UI. When I click on the UI, the reaction is ...
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48 views

More Pythonic way to loop through UpdateCursor?

I have several sets of fields to populate based on other fields. The code below works, but I am wondering if there is a more Pythonic way to march through the i,j pairs? (Actual fieldnames are not ...
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1answer
119 views

Speed up intersection, union in PostGIS?

I have three tables: water, wetlands and parcels. I want to update parcel table with area that is covered by water or wetland (they can overlap). So I want to Merge water with wetland Dissolve and ...
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1answer
78 views

Optimizing workflow for FUSION's PolyClipData?

I have multiple large LiDAR datasets (.laz) from different areas, where I need to extract buildings. I have prepared a shapefile containing a buffer around the buildings I care about, and are using ...
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53 views

MS SQL Server STEnvelope() performance

Using MS SQL Server 2012, when we write a query with select GEOM.STEnvelope() from table where table holds approx. 4000 native SQL Server line geometries of type geometry, with 2/6/180 points min/...
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49 views

Does Geopackage field length affect performance?

I have moved away from shapefiles, and now store most of my desktop spatial data in a Geopackage. One of my fields is used to store research notes and is 'Type TEXT' with a character limit of 254. I ...
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87 views

pgrouting extension slow in PostgreSQL 10?

I am trying to implement routing on my road dataset using pgrouting function pgr_createTopology. It works fine on postgresql 9.6 but gets extremely slow and get stuck as nodes increase in postgresql ...
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1answer
129 views

Geoserver slow rendering un-cached layers

I have GeoServer connected to a SQL Server datastore. I have a map with 5 Layers, the layers have about 200,000 features total. The features are styled as simple points or lines - not many lines ...
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1answer
76 views

Leaflet GeoJSON Map Buffering

I am using Leaflet with Custom GeoJSON Layers to display my map. I noticed that the map off-screen is only loaded after releasing the mouse button during a drag. Hopefully, this demo makes it more ...
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38 views

Nesting styles for increased drawing speed

I have zoning plans for a municipalities ( for example 5700 features in this one) and I have created a QGIS-style to make it look like the offical style. There are 72 colours/patterns for the ...
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115 views

GeoServer GetMap with geopackage very slow (with high zoom levels)

I have a GeoServer instance and have imported multiple high res tiff files as layers and created a layergroup from the layers. When I call the WMS endpoint with a specified bbox and the geopackage ...
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37 views

Speeding up contouring of .mrr files in Mapinfo?

I'm contouring relatively small 30m resolution grids - 50-100mb .mrr files. Creating a simple 1 level contour takes hours! I let a slightly larger one run on a spare machine and it took days. Is ...
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2answers
38 views

Data Driven Pages Optimization for the same FC referenced twice

I have a feature class that I am referencing twice in my map, for "active" features that are "the subject" of the map page as a Feature Layer second Feature Layer that is grayed out/"inactive" on ...
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2answers
298 views

Healthy number of tables in PostgreSQL schema?

I manage a PostgreSQL + PostGIS database with two schemas of 200 and 120 tables. I wonder if this is correct or I should organize the tables in more and smaller schemas. So far, we hadn't had any ...
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33 views

Network Analyst takes so long

Is there some kind of limitations of number of features when we work with Network Analyst in SDE ? My net has 170.000 features, is it a problem ? Because it take at least 6 hours to finish the "Build ...
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1answer
68 views

Improving ArcMap Batch Production of PDF Maps Performance?

I am producing 1,500 PDF maps and was wondering what changes I can make to either my machine or to ArcMap to help speed things along. Currently, it takes 5:45 - 6 minutes to produce four maps. If I ...
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1answer
208 views

MySQL 8 MBRIntersects 10 times slower than PostGIS equivalent

I'm trying to migrate a PostGIS database to MySQL 8 and am having a big performance hit when it comes to MBRIntersects. Using Mapbox to render vector tiles, I need to extract geometry intersecting ...
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1answer
54 views

Openlayers ArcGIS image vs tile service performance

I want to show my ArcGIS REST MapServer image tiles on my OpenLayers 4 application. But there are two kind of examples to use ArcGIS MapServer. ImageLayer and ImageArcGISRest TileLayer and ...
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95 views

Performance issues in Carto-VL?

UPDATE: Issue will be solved in next version of Carto. See github I'm using Carto VL to build a simple webapp for some data inspection within our GIS team. The web-app can be found here (Link might ...
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0answers
82 views

Caching WFS requests using OpenLayers?

I'm investigating how we can improve our vector-layer performance of our GIS component (based on openlayers 4). OpenLayers keeps all the fetched vector features in memory. This becomes a problem ...
3
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1answer
295 views

Understanding Extract Multi Values to Points performance in ArcPy?

I am trying to extract points from multiple raster files into a points shapefile. I have about 320,000 unique XY coordinates which need to extracted values from 37 raster files. I tried running the ...
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2answers
297 views

Nearest Neighbor

We've got a table of approximately 300,000 points and would like to find the nearest neighbor (within 10km) to each point in the same table. The most efficient query we've found so far is below, but ...
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1answer
31 views

Xray extension slowing down Catalog

I recently installed Xray for Catalog and my Catalog has been insanely slow ever since. I've uninstalled the Xray extension but my Catalog is still slow. Any suggestions to speed Catalog back up to ...
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0answers
110 views

Labels are loading slowly in ArcMap?

I am trying to speed up the process of loading labels in ArcMap. There are few layers containing labels that have a conditional form (not only in content but also text formatting). According to Esri ...
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1answer
426 views

Fastest way to know in which section of line is a point

I have a line and a point. I want to locate where is this point in the line according to imaginary sections I make (any way I want). The output should be in which number of section is the point (...