Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [sum]

The tag has no usage guidance.

0
votes
0answers
9 views

Drawing polygon and summarizing values in map on Portal for ArcGIS?

I have a map application created in Portal for ArcGIS. I have a points layer in the map. Each point has a numeric value. I want to be able to draw a polygon on the map, containing some of the points. ...
-1
votes
1answer
34 views

Sum fields in ArcGIS

I need to merge fields in rows in the attribute table based on common values of some attributes and calculate the sum of the area associated to them. How can I do that?
1
vote
0answers
57 views

QGIS “Sum Line Lengths” return 'nan.'

I have a polygon shapefile and a (merged) line shapefile (both are zipped). When I use Vector -> Analysis Tools -> Sum Line Lengths on these shapefiles, I get a layer with some of the LENGTHS filled ...
4
votes
1answer
99 views

Summing attribute values of overlapping polyline portions in QGIS 3.0.3

Note: This is basically the same question that I asked before in Summing attribute values of overlapping polyline portions in ArcGIS Desktop?, but this time, I'm trying to solve the same problem using ...
1
vote
2answers
113 views

Summing values from multiple polygons per neighbourhood in QGIS?

I'm measuring different values of urban parks (groundwater recharge, CO2 sequestration etc.), assignning values to the park polygons as attributes of a layer. Now I would like tu sum them up to have ...
3
votes
1answer
79 views

Grouping neighbor points based on field sum in QGIS

I have about 14,000 points. These points have a specific field "time", an integer value, mainly between 1, 2 or 3. I would like to split these 14,000 points into groups based on the "time" field ...
0
votes
1answer
270 views

Calculate sum of line lengths in R

I have object1 with polygons and object2 with lines. I am looking for a way in R (preferably with the package sf) to calculate the sum of line lengths from object2 for each polygon in object1. The ...
1
vote
2answers
124 views

Summing attribute values of overlapping polyline portions in ArcGIS Desktop?

I have polylines of 80+ bus routes operating in a city. The polylines have attribute values for the number of passengers, number of trips, etc. Many of the polylines overlap at certain areas of the ...
0
votes
1answer
56 views

Creating column in attribute table from summarised fields using QGIS?

I want to create a new (third) column in my attribute table. The fields of the new column are supposed to be the summarised value of the two other columns' fields. For example field 1 of the column I ...
2
votes
1answer
59 views

Using Sum in QGIS Attributes?

How to sum all 'Luas_sawah' attributes in accordance with the 'Kabupaten' attributes?
1
vote
1answer
121 views

Get sum of a field for each element of overlapping paths

I've used the very useful Openroute service to develop a number of routes which I have populated with traffic numbers (on each route). I want each section of road to present the total of a field (...
0
votes
1answer
28 views

Adding Values in Overlapping Buffers

I have a series of points that represent oil and gas wells (over 1,000), and an emissions value for each well. I created 3 concentric buffers that represent increasing distance from the well, and ...
0
votes
0answers
63 views

Coloring merged shapes by the Map Coloring plugin, ERRORS

I use QGIS 2.18.4. I merged two polygon layers with the "Sum" tool. I colored it with the plug-in "Map coloring". There are errors: http://www.wolniludzie.com/mapcoloring/screenshot1.jpg http://www....
1
vote
1answer
27 views

Summing attribute values from many points geocoded on same location using ArcGIS Desktop?

I have geocoded a batch of addresses and many of these are geocoded on the same location. Now I want to keep just one point on each location but sum the field values of all points from the same ...
2
votes
2answers
196 views

Adding up data values from different vector layers

I have multiple files each loaded as a layer. Each file has just an easting northing and a count value, as below. easting,northing,count 435575,804275,15 435625,804225,29 435625,804275,39 435625,...
2
votes
1answer
139 views

Why QgsRasterCalculator result is incorrect in pyqgis?

I want to sum 4 raster layers by QgsRasterCalculator. Below code creates a raster layer as result, but pixel values in raster result is wrong. what is the error in this code? from qgis.core import * ...
5
votes
2answers
108 views

How to sum multi values for each pixel in PyQGIS?

I have a raster layer and a vector point layer. I calculated distance between center each pixel and each point based on @YoLecomte and @mgri, this link and xunilk, this link. For each pixel there are ...
1
vote
0answers
251 views

How to summarize overlapping polygon values within a single layer?

At ArcGIS Desktop 10.5, I have a polygon file geodatabase feature class. Many of its polygons are spatially coincident; that is, if I click on a single polygon in Arcmap to select it, the resulting ...
7
votes
3answers
378 views

Sum integer values if values in another column are equal in QGIS?

I want a new column called "Summed" containing the summed value per "Populatie" name. How can I accomplish this?