0
votes
1answer
7 views

Hillshade result after mosaicing multiple rasters appears irregular

I am trying to mosaic 19 rasters which i already reprojected in WGS 1984 World Mercator and then hillshading them. These are the steps i follow please correct me if i am doing something wrong. I ...
0
votes
0answers
9 views

How to optimalize the PostGIS k-nearest neighbour function for a large amount of polygons?

I created a function for identifying the K nearest neighbours for every municipality, which works fine, but when I use this function for a large amount of municipalities (over 2900) it takes over 2 ...
0
votes
0answers
8 views

Maximum Liklihood Image Classification; Does this algorithm consider RGB Band values only?

if it is correct that Maximum Liklihood classification algorithm takes into account RGB values of the bands only, then is it useless to stack other bandslike NIR SWIR etc prior to go ahead and use ...
0
votes
0answers
11 views

Which points in projected raster corresponds to certain latitude,longitude location?

What I have is a SRTM 3 arc-second raster file in WGS84 geographic coordinate system (here is that file). I then project it to the Azimuthal Equidistant projection with GDAL: gdalwarp -s_srs ...
-2
votes
1answer
14 views

How can I import KML (unzipped KMZ) into QGIS 2.8.3? [duplicate]

Can I import KML from http://gis.nature.cz/arcgis/rest/services/PrirodniPomery/Geomorfologie/MapServer into QGIS 2.8.3? Edit: error message is in czech ("data source is not valid"); I added ...
0
votes
0answers
8 views

Adding row to new empty table using ModelBuilder? [on hold]

I can create a point feature class and start an edit session in ArcMap which adds a row and I can enter data. So far i haven't created a point - just added data to the table. What i want to do is ...
0
votes
0answers
9 views

how do I get percentages of classes in a classified image?

I am using ArcMap 10.3 I have two layers, one classified raster, Landsat based dNBR, where classes show burn severity, and a shapefile containing polygons, drawn based on the dNBR image and that ...
-1
votes
1answer
7 views

Getting started with Geotools? [on hold]

I want to get full guidance for using geotools from scratch in Java language. Can you show me the path or give me the suggestions about where I can start this? I am an intermediate level of java ...
0
votes
0answers
6 views

Why gdalsrsinfo is not listing the filenames?

I am using gdalsrsinfo to extract the projection details of tab/shp files in multiple folders using the code mentioned below. for /R .\ %%f IN ("*.tab") DO gdalsrsinfo -o wkt "%%f" ...
0
votes
0answers
13 views

Use array[] datatype in qgis from postgresql

I'm just a beginner in GIS, so I'll be glad to see any comment here. I have tables in PostgreSQL which I've connected to QGIS. There are columns in tables with datatype array[]. But it's not easy for ...
1
vote
1answer
11 views

What is the easiest way to avoid shapefile columns being imported as PostGIS `numeric(p,s)` data type?

Considering the number of shapefiles I've imported to PostGIS (using shp2pgsql or ogr2ogr), I'm a little surprised I haven't come across this before. But I have a shapefile that has numeric columns ...
0
votes
0answers
16 views

Confusion over Describe properties?

Can someone clarify the meaning of the 'fullPropsRetrieved'and 'metadataRetrieved' properties of a Describe object. In particular my confusion is regarding the definitions provided on the ESRI website ...
0
votes
0answers
4 views

store the output of gdal_rasterize as a pgraster?

I was wondering when using gdal_rasterize to convert something to a raster, is it possible to store the output raster as the PostGIS raster instead of, say, a tif? For example: I have the following ...
1
vote
1answer
19 views

How to make an arcpy tool to take multiple inputs csv/text lists, instead of a single input?

It's been only few days that i've been working in python environment. Based on this code, i've been trying to batch few process for our QAQC task's. At certain times, like when i use ...
0
votes
0answers
20 views

DWG to SHP - suddenly a huge ammount of data in one file

I converted four DWG-Files with ArcMap to SHP. Suddenly one data had a huge ammount of data: file 1: DWG: 4,5 MB ----> SHP. 9,7 MB file 2: DWG: 12,7 MB --> SHP: 110 MB (!) file 3: DWG: 3,4 MB ...
0
votes
0answers
11 views

Why ArcGIS crashes when I load raster file created in R? (HFA format)

I was processing my raster operation in R, as I think it's easier then in ArcGIS: - read shp + raster1 - crop them - classify raster1 by location - create classified raster2 - export the ...
0
votes
3answers
29 views

Download a region as KML/OSM from internet Maps

I need to create a custom Euro Region map from several regions of neighborhood countries. Say Spanish "Galicia" and Portugal "Norte" regions. So, I need to combine 2 KML/OSM/... files. My question ...
0
votes
0answers
7 views

Create a grid over shapefile then save each section into GeoTIFF

I have a massive shapefile with 200,000+ building polygons. I've loaded these up in ArcGIS. I need to convert this into a usable raster (GeoTIFF) that can then be tiled using MapTiler. My current ...
0
votes
0answers
8 views

UTFGrid grid map generated by TileMill v0.10.1 looks off from the actual map

I have been trying to create UTFGrid from shapefiles using TileMill v0.10.1. For some reason the grid map it generated looks like it is stretched from the original map. For Example: This is the ...
-1
votes
0answers
9 views

Using Leaflet Marker Cluster with Turf [on hold]

Has anyone had success with using turf with MarkerCluster? I would think since both include functionality for L.marker they would but would like to confirm.
0
votes
0answers
12 views

Problem when importing Photoshopped geoTIFFs back into ArcGIS 10.3.1 using listgeo/geotifcp tools

I have the following problem: After manipulating a georectified raster image in GIMP and using the tools listgeo and geotifcp to retain the geospatial information, ArcGIS only displays a black image. ...
-3
votes
0answers
21 views

Naming output file as the absolute path name [on hold]

I have a model for a class that outputs files with an iterator to get all files in directories and sub-directories and output them to a File geodatabase. The professor wants me to have the model ...
0
votes
1answer
12 views

Processing “Join by attribute” issue

I don't know what's going wrong when I try to join a shape file with an xls or csv. I do have the same identifier in both files. The joined file has all the expected columns but they are all empty. ...
1
vote
1answer
75 views

Populating an attribute field [on hold]

I want to add another field to an attribute table, a number field. This number field will show in my opinion the experience visiting the ski resort, from 1 (the worst) to 10 (the best). Those that I ...
3
votes
1answer
42 views

Deauthorizing ArcGIS for Desktop 60 Day Trial

I installed ArcGIS For Desktop Advanced 60 Day Trial. I'm not sure what went wrong, but I didn't get a clean install. I uninstalled it. I later installed ArcGIS For Desktop, and went through the ...
0
votes
0answers
15 views

Auto populate a field in a dbf table [on hold]

I have a shapefile that contains many points and I want to create another column and auto populate it with a text string. I have tried the function editor and I can auto populate the selected field, ...
1
vote
0answers
9 views

“getting Unknown projection string error” serving EPSG:4326 tiles with open street maps mapnik renderd [on hold]

The goal: I am attempting to generate map tiles with EPSG:4326 instead of web mercator by specifying EPSG:4326 in the mapnik style file srs attributes My current setup: I am running Ubuntu 14.14 ...
1
vote
2answers
27 views

How calculate shortest distance from start to end river?

how can I calculate the straight distance from the start to the end point of a river? I don't know how to do this automatically.
-1
votes
0answers
22 views

Most representative spatial queries [on hold]

I would like to do few tests of different spatial databases and compare response times for different types of queries. There are some studies available but they often do not present the selection of ...
1
vote
1answer
17 views

Deleting nearly identical points in one dimention

I have extracted values from a raster in table form, done some calculations and plotted these points as XY data, in which I hope to use to create a line. However due to the original layout of the ...
1
vote
2answers
22 views

Over-calculation of area due to parcels occupying same space

I'm trying to get the total acreage of different parcels by land use, and unfortunately I keep getting a total of ~15000 acres instead of ~12000 because it's over-calculating the area where there are ...
1
vote
1answer
37 views

Python Script GetParameterAsText?

I am writing a python script to be added to a toolbox and I do not know how to call an existing tool to be a parameter. import geocoder ##geocoding library import csv import arcpy ...
1
vote
1answer
21 views

Updating table setting a case with ST_Intersection

I'm trying to update a geometry column using this command: UPDATE mad SET geom_p=CASE WHEN ST_CoveredBy(mad.geom,b.geom) THEN mad.geom ELSE ST_Multi(ST_Intersection(mad.geom,b.geom)) END AS ...
1
vote
0answers
19 views

Can I reorder the points in a GEOS LineString?

Using libgeos, when I buffer() a polygon and then getExteriorRing() [to make a slightly smaller outline copy of the polygon just inside the original], it seems that which point on the new geometry is ...
2
votes
1answer
19 views
0
votes
1answer
16 views

Leaflet display only clicked element of a loaded map layer (polyline)

I am creating a web mapping application that will return appropriate routes based upon ST_length query on a cartoDB dataset. So far, the code below successfully maps those routes with individual ...
0
votes
0answers
9 views

How to apply Mapnik Zoom Level Styling via Leaflet Zoom Levels

I've setup a node mapnik server to render some tiles for polygons. The application I've built to call out to these tiles is in Leaflet An example of a current mapnik styling rule is below <Style ...
0
votes
0answers
11 views

stream link classifying unique reach ID by order rather than from node to node

I am trying to use the stream link tool in the hydrology tools to generate a unique ID for each reach, based on strahler order. In other words, if a lower order stream intersects with a higher order ...
1
vote
0answers
21 views

Merge points from multiple features that share common attribute

I have several point feature classes that all share similar attribute structure. How might I extract the points from all 9 feature classes that share a specific attribute? Background: There are 9 ...
4
votes
1answer
61 views

ArcGIS 10.3.1 cannot display simple TIFF image created with GIMP (graphic software)

I have the following issue: I used the graphic software program GIMP to create a really simple TIFF image - white background layer, a couple of black polygons on it. For some reason I can't import ...
0
votes
0answers
21 views

Compare data from different sources

I have two files in QGIS about restaurants in the same area, how can I get elements that are only in the first source and not in the second and viceversa, connected to the same activity? I also need ...
2
votes
0answers
11 views

Export lines or graphics without losing the details / generate graphics without having lines overlapping

I am new to this platform and desperately need an answer to the question below: How do I easily reproduce a spatial diagram such the one attached (Picture); from shapefiles on ArcGIS. I very often ...
3
votes
0answers
18 views

Tools to help migration from Mapserver to QGIS Server

I'm going to migrate a Mapserver WMS server to QGIS Server. I'd like to know if there are some tools or plugins that convert Mapserver mapfile (.map) to QGIS project file (.qgs).
-2
votes
1answer
14 views

Set zoomScale for CMV search widget

I would like to change the zoomScale parameters for the selected search item. The widget currently zooms in to far for the area I need to focus on.
1
vote
0answers
11 views

Why does connected polyline (KML file) appear unconnect in arcmap as layer?

I created polygone in google earth and imported it to arcmap as layer. All things are OK but when I converted polygon to polyline, there some parts of polyline has not shown although its vertices ...
0
votes
1answer
10 views

openlayer 3 ol.source.xyz set custom origin

I am using local tiles from my file system in openlayers 3 (ol.source.xyz), and my local tiles are stored as 0/0/0.png and so on. Now the thing is that when I use this tiles on my map is starts from ...
3
votes
0answers
18 views

Classify image using segmentation analysis using QGIS and OrfeoToolbox

My first question on stackexchange (sorry for my english language)! I use stackexchange often to understand GIS principles and workflows. I wasn't able to find a answer. For this project we made a RGB ...
0
votes
0answers
15 views

Seeking free Route Service for ArcGIS Online Account?

I am creating a web application for Election Polling places in my county. I am using the District Look-up widget and my Auditor's office wants routing capabilities. We can't use the default routing ...
2
votes
0answers
27 views

How convert ESRI online basemap to new coordinate system

I have a arcgis we application that depends on all coordinate systems of the layers and basemaps to be the same, which I would think is standard practice. I like to just use the esri online basemaps ...
3
votes
0answers
26 views

Rectangle shapefiles with the same extents does not align perfectly after projection

I have a rectangle shapefile built with UTM19 coordinates using a python script, and then projected to NAD83_CSRS (EPSG:4617). I have a second rectangle shapefile built with the same method (python ...

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