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KrishV
Occasional Contributor III
since
01-28-2016
01-11-2024
147
Posts created
76
Kudos given
2
Solutions
38
Kudos received
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My Ideas
(3 Idea Submissions)Latest Contributions by KrishV
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Hi Everyone, I'm trying to use California wildfires 2017 - Thomas Fire analysis Sample provided in ArcGIS Python API Samples. I have used sentinel imagery to do the same analysis but I always end up getting black imagery (All 0s). Can you please suggest where I'm doing wrong? import arcgis
from arcgis import *
from arcgis.mapping import MapImageLayer
gis = GIS(profile="krishna_dev")
#Sentinel2
sentinel_item = gis.content.search('title:Sentinel2', 'Imagery Layer', outside_org=True)[0]
sentinel = sentinel_item.layers[0]
sentinel_item
aoi = {'spatialReference': {'latestWkid': 3857, 'wkid': 102100}, 'type': 'extent',
'xmax': 9028482.969, 'xmin': 8908018.212, 'ymax': 2478700.211, 'ymin': 2248166.133}
arcgis.env.analysis_extent = {'xmax': 9028482.969, 'xmin': 8908018.212, 'ymax': 2478700.211, 'ymin': 2248166.133,
"spatialReference":{"wkid":102100,"latestWkid":3857}}
sentinel.extent = aoi
import pandas as pd
from datetime import datetime
selected = sentinel.filter_by(where="(Category = 1)",
time=[datetime(2020, 4, 3), datetime(2020, 4, 15)],
geometry=arcgis.geometry.filters.intersects(aoi))
df = selected.query(out_fields="acquisitiondate, name, cloudcover",
order_by_fields="acquisitiondate").sdf
df['acquisitiondate'] = pd.to_datetime(df['acquisitiondate'], unit='ms')
df.tail()
prefire = sentinel.filter_by('OBJECTID in ( 10127407, 10187367)') # 2020-04-03
prefire = prefire.blend()
midfire = sentinel.filter_by('OBJECTID in (10304749, 10304746)') # 2020-04-13
midfire = midfire.blend()
from arcgis.raster.functions import *
extracted_band = extract_band(midfire, [13,12,4])
extracted_band_prefire = extract_band(prefire, [13,12,4])
nbr_prefire = band_arithmetic(prefire, "(b9 - b13) / (b9 + b13) + 2000")
nbr_postfire = band_arithmetic(midfire, "(b9 - b13) / (b9 + b13) + 2000")
nbr_diff = nbr_prefire - nbr_postfir
nbr_diff
burnt_areas = colormap(remap(nbr_diff,
input_ranges=[0.1, 0.27, # low severity
0.27, 0.44, # medium severity
0.44, 0.66, # moderate severity
0.66, 1.00], # high severity burn
output_values=[1, 2, 3, 4],
no_data_ranges=[-1, 0.1], astype='u8'),
colormap=[[4, 0xFF, 0xC3, 0], [3, 0xFA, 0x8E, 0], [2, 0xF2, 0x55, 0], [1, 0xE6, 0, 0]])
burnt_areas Thanks, Krish
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12-08-2020
01:00 AM
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4
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640
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Hi All, While Running Survey123 Template from App Studio (Version : 4.3.193), I'm getting below error: Please let me know how to fix this error. Erwin Soekianto Thanks, Krish
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09-21-2020
05:35 AM
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1
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342
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POST
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Hi Mehdi Pira, The code you provided is running successfully but It doesn't change anything in the webmap. Thanks, Krish
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09-14-2020
08:09 PM
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0
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0
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2080
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POST
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Dear All, Is it possible to Enable popup in Web Map using ArcGIS API for Python? Thanks, Krish
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09-14-2020
07:37 AM
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5
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2193
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Thanks Robert Scheitlin, GISP! It worked Perfectly. I'm just getting extra columns x and y in csv. Thanks, Krish
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04-18-2020
02:40 AM
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1
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1048
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Hi Robert Scheitlin, GISP, I tried to find "_genereateFields" function in jimu.js/exportUtils.js file but unable to find it (WAB 2.15). Do I have to create another function with this name? I have tried by commenting below lines but still, it downloads all the fields: findPopupInfo: function(featureSet) {
if (!featureSet || !featureSet.features || featureSet.features.length === 0) {
return null;
}
var feature = featureSet.features[0];
var layerId;
var fields;
/*
if(feature._layer) {
//fields = feature._layer.fields;
//layerId = feature._layer.id;
var layerInfos = LayerInfos.getInstanceSync();
var layerInfo = layerInfos.getLayerInfoById(layerId);
if (layerInfo) {
var popupInfo = layerInfo.getPopupInfo();
if (!popupInfo) {
// Try another way to get popupInfo
popupInfo = layerInfo.layerObject.infoTemplate && layerInfo.layerObject.infoTemplate.info;
}
return popupInfo;
}
}*/
return null;
}, findLayerDefinition: function(featureSet) {
if (!featureSet || !featureSet.features || featureSet.features.length === 0) {
return null;
}
var feature = featureSet.features[0];
// if(feature._layer) {
// return {
// geometryType: featureSet.geometryType,
// fields: feature._layer.fields
// };
// }
var fields = [];
var attributes = feature.attributes;
var item;
for (item in attributes) {
if(attributes.hasOwnProperty(item)){
fields.push({
name: item
});
}
}
return {
geometryType: featureSet.geometryType,
fields: fields
};
}, Thanks, Krish
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04-09-2020
02:00 AM
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3
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1048
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Hi Robert Scheitlin, GISP, I'm using WAB 2.15. Thanks, Krish
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04-08-2020
02:30 AM
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5
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1048
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POST
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Hi Robert Scheitlin, GISP, Yes. I'm getting expected fields only. But when clicked , on export to csv, i'm getting all the fields in downloaded csv file. Thanks, Krish
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04-06-2020
04:38 PM
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7
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1048
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POST
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Hi All, I have seen Robert Scheitlin, GISP solution on below link and tried the same using WAB 2.15 but all the fields are getting downloaded in my csv. Web App Builder - How to limit fields in "export to CSV" option in query widget? I have tried below code: var resultfields = [];
for (i=0; i< popupInfos.length-1; i++){
if (popupInfos[i].visible == true){
resultfields.push(popupInfos[i].fieldName)
}
}
var fFlds = array.filter(layer.fields, lang.hitch(this, function(fldInfo) {
return resultfields.indexOf(fldInfo.name) > 0;
;}));
var featureSet = new FeatureSet();
featureSet.fields = lang.clone(fFlds); Please help. Thanks, Krish
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04-04-2020
04:09 AM
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0
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10
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1357
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Yes Erwin. Is there any way I can reduce the size or it will be approx 60MB?
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02-25-2020
08:41 AM
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420
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Hi Graham Hudgins, I have tested with hosted feature service and Downloads is getting enabled but map is getting hidden as shown below: But for feature services (Extract Capability) download is getting disabled but able to see on map and unable to download & Chart errors remain the same. Thanks, Krish
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02-25-2020
08:29 AM
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1
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254
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Hi Graham Hudgins, Published a feature service without extract capability (10.6.1) to ArcGIS Server and used it in ArcGIS Hub then we were able to download the service. Same process we followed now (tested with extract capability also). We have the download options disabled in both ArcGIS Hub and Sites. Also, when i used 10.6.1 feature service in the sites, download status shows as shown below: Nicole Ueberschär: Were you able to fix? Thanks, Krish
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02-24-2020
08:33 PM
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6
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POST
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Hi Graham Hudgins No, I have shared with everyone. Thanks, Krish
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02-24-2020
08:13 AM
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11
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Hi Erwin Soekianto, thanks for your response. I have checked the folder size by clicking on files from AppStudio for ArcGIS and found the size is only 5.13 MB as shown in below screenshot. But when I upload and make it as app, the size becomes 60 MB. Can you suggest how to reduce file size? Thanks, Krish
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02-24-2020
07:56 AM
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2
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420
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Hi All, I'm using Enterprise sites 10.7.1 When I click on any of the attribute, I'm getting below error instead of Chart. Also my download option is disabled. I'm using Feature Service and Shared to everyone if I have to change anything. Even, if there are one unique value, instead of showing some graph, it shows empty chart. Is it expected behaviour.? Please suggest. Thanks, Krish
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02-24-2020
07:50 AM
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My kudoed posts
| Title | Kudos | Posted |
|---|---|---|
| 1 | 11-16-2021 03:44 AM | |
| 1 | 08-21-2019 10:49 PM | |
| 1 | 12-08-2020 08:29 PM | |
| 1 | 12-08-2020 01:22 AM | |
| 1 | 06-04-2017 08:38 AM |
Activity Feed
- Posted Open dialog box from Map Layers Widget on ArcGIS Experience Builder Questions. 04-08-2023 10:55 AM
- Posted Re: Share Events in ArcGIS Hub on ArcGIS API for Python Questions. 03-22-2023 07:28 AM
- Posted Re: Share Events in ArcGIS Hub on ArcGIS API for Python Questions. 03-21-2023 06:30 AM
- Posted Re: Share Events in ArcGIS Hub on ArcGIS API for Python Questions. 03-17-2023 05:48 AM
- Posted Share Events in ArcGIS Hub on ArcGIS API for Python Questions. 03-10-2023 09:36 AM
- Got a Kudo for Publish service from Spatial Data frame (Service Name). 05-04-2022 11:37 AM
- Posted Re: How to apply Raster Function to an Image Service on ArcGIS JavaScript Maps SDK Questions. 02-14-2022 09:11 AM
- Kudoed How to apply Raster Function to an Image Service for MariamJamilah. 02-14-2022 09:08 AM
- Kudoed Re: List GIS Servers by URL instead of Name for MehdiPira1. 11-22-2021 06:19 AM
- Kudoed Re: Buffer Analysis using arcpy for DanPatterson. 11-22-2021 06:18 AM
- Kudoed Re: Overwrite a service from a spatial data frame for J_R_Matchett. 11-22-2021 06:13 AM
- Kudoed Re: FeatureLayer Calculate SQL Syntax for jcarlson. 11-22-2021 06:12 AM
- Kudoed Re: Query items from today's date using Python API for jcarlson. 11-22-2021 06:11 AM
- Posted Re: Publish service from Spatial Data frame on ArcGIS API for Python Questions. 11-16-2021 03:46 AM
- Posted Publish service from Spatial Data frame (Service Name) on ArcGIS API for Python Ideas. 11-16-2021 03:44 AM
- Posted Re: Publish service from Spatial Data frame on ArcGIS API for Python Questions. 11-16-2021 03:40 AM
- Posted Publish service from Spatial Data frame on ArcGIS API for Python Questions. 11-15-2021 11:09 AM
- Got a Kudo for Zoom Level for Polygon. 09-20-2021 05:43 AM
- Kudoed Customizable Portal Sign-in Page for EricPeña. 09-12-2021 10:20 PM
- Posted Unable to clone Web Mapping Application Consisting of Living Atlas Layers or ArcGIS Online Layers on ArcGIS API for Python Questions. 08-06-2021 04:56 AM
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